KELLY, Circuit Judge.
This case presents the question whether claims by the FDIC as receiver (FDIC-R) of Columbian Bank & Trust (Columbian) against three ex-directors of Columbian are covered under a Directors and Officers Liability Insurance Policy (the policy). Defendanb-Appellants Carl McCaffree, Jimmy D. Helvey, and Sam McCaffree (director-defendants) and the Federal Deposit Insurance Corporation (FDIC) appeal the district court’s grant of summary judgment to Banclnsure, Inc. (Bancln-sure). BancInsure, Inc. v. McCaffree, 3 F.Supp.3d 904, 910-16 (D.Kan.2014). The district court 'held that claims by the FDIC-R were unambiguously excluded by the policy’s “insured v. insured” exclusion and that Banclnsure was not judicially es-topped from denying coverage. We have jurisdiction under 28 U.S.C. § 1291, and we affirm.
Background
Banclnsure issued the policy to Colum-bian and its parent Columbian Financial Corporation (CFC) for the period of May 11, 2007 to May 11, 2010. App. 81.1 Under the policy, Banclnsure agreed to pay “Loss which the Insured Persons shall be legally obligated to pay.” Id. at 74. “In[1231]*1231sured Person” was defined as “all persons who were, now are or shall be the directors and officers [of CFC and Colum-bian].” Id. The policy provided an aggregate liability limit of $5,000,000 per year. Id. at 81.
The original policy contained two exclusions pertinent here: an “insured v. insured” exclusion and a “regulatory” exclusion. The insured v. insured exclusion provides:
The Insurer shall not be liable to make any payment for Loss in connection with any Claim made against the Insured Persons based upon, arising out of, relating to, in consequence of, or in any way involving ... a Claim by, or on behalf of, or at the behest of, any other Insured Person, the Company, or any successor, trustee, assignee or receiver of the Company....
Id. at 75-76 (emphasis added). The exclusion makes exception for “a shareholder’s derivative action brought on behalf of the Company by one or more shareholders who are not Insured Persons and make a Claim without the cooperation or solicitation of any Insured Person or the Company.” Id. at 76.
The regulatory exclusion, on the other hand, excluded coverage for “any action or proceeding brought by or on behalf of any federal or state regulatory or supervisory agency or deposit insurance organization,” including “any type of legal action which any such Agency may bring as receiver.” Id. However, the insured purchased a “regulatory exclusion endorsement” to the policy, which amended the policy “by the deletion of’ the regulatory exclusion. Id. at 89. The endorsement further set a maximum aggregate liability cap of $5,000,000 for claims brought by “any federal or state regulatory or supervisory agency or deposit insurance organization,” and stated that any such payments would reduce the liability limit of the policy as a whole. Id. Notably, the endorsement also stated: “Nothing herein contained shall be held to vary, waive or extend any of the terms, conditions, provisions, agreements or limitations of the above mentioned policy other than as above stated.” Id. According to materials Banclnsure provided to Colum-bian before it purchased the policy, under the regulatory endorsement, “[t]here is full coverage for actions by regulatory agencies.” Id. at 418. Banclnsure’s own marketing materials described the endorsement as a “broadening feature.” Id. at 427. Other Banclnsure internal documents also characterized the FDIC-R’s claims as “regulatory” in nature. Id. at 437, 438, 439, 442, 444.
On August 22, 2008, the Kansas State Bank Commissioner declared Columbian insolvent and appointed the FDIC as receiver. By operation of law, the FDIC-R succeeded to “all rights, titles, powers, and privileges of [Columbian], and of any stockholder, member, accountholder, depositor, officer, or director” of Columbian. 12 U.S.C. § 1821(d)(2)(A). In early September 2008, Banclnsure received notice of potential claims the FDIC-R intended to file against the bank’s officers and directors. Aplt. App. 456-57, 680-89.
In anticipation of such a suit, CFC and director-defendant Carl McCaffree brought suit against Banclnsure seeking a declaratory judgment that the policy covered claims made after August 22, 2008— the date Columbian was declared insolvent — but before the expiration of the policy. As part of this litigation (the Colum-[1232]*1232bian litigation), CFC issued a series of interrogatories to Banclnsure regarding coverage of certain claims, including claims by deposit insurance organizations acting as receiver of Columbian. Banclnsure indicated that such claims would be covered under the policy so long as Banclnsure was given proper notice. 'App. 409, 411. These responses were purely hypothetical, as the FDIC-R had not yet brought any such claims and did not bring them until over two years later. Aplee. Supp. App. 38.
The district court ultimately held that the policy remained in effect until May 11, 2010, relying in part on its finding that the regulatory endorsement “provides coverage for actions brought by deposit insurance organizations as receivers during the policy year,” which would be meaningless if the policy terminated upon appointment of a receiver. Columbian Fin. Corp. v. BancInsure, Inc., No. 08-2642-CM, 2009 WL 4508576 (D.Kan. Nov. 30, 2009). On appeal, we sua sponte determined that no case or controversy existed at the time of the district court’s judgment and remanded with instructions to vacate the judgment for lack of subject matter jurisdiction. Columbian Fin. Corp. v. BancInsure, Inc., 650 F.3d 1372, 1385 (10th Cir.2011).
Banclnsure filed the instant action against the director-defendants in Kansas state court in August 2011, seeking a declaratory judgment that it owes no duty of coverage to the director-defendants for claims brought against them by the FDIC-R. The FDIC-R joined and removed the action to the federal district court in Kansas. At approximately the same time, the FDIC-R brought claims against several of Columbian’s former directors and officers alleging negligence, gross negligence, and breach of fiduciary duty. The FDIC-R explicitly stated that it brought suit “in its capacity as Receiver of The Columbian Bank and Trust Company.” Aplee. SuppApp. 38. Banclnsure, the director-defendants, and the FDIC-R reached a settlement in February 2013 pursuant to which the director-defendants confessed judgment in favor of the FDIC-R for $5,000,000, and both Banclnsure and the director-defendants have made payments in partial satisfaction of this judgment. The settlement allows Banclnsure to seek reimbursement if it succeeds in this litigation.
The parties filed cross-motions for summary judgment on the issue of coverage. On February 27, 2014, the district court granted Banclnsure’s motion, finding that the insured v. insured exclusion unambiguously excluded from coverage claims by the FDIC-R against director-defendants. BancInsure, 3 F.Supp.3d at 910-15. Further, the district court held that Bancln-sure was not judicially estopped from denying coverage based on its answers to CFC’s interrogatories in earlier litigation. Id. at 915-16. The FDIC-R and director-defendants (collectively, Appellants) timely appealed. In the interim, Banclnsure was placed into receivership and liquidated, and the Kansas Insurance Guaranty Association (KIGA) intervened to defend Ban-clnsure’s rights pursuant to Kan. Stat. Ann. § 40-2906(a)(2).
Discussion
Appellants raise two arguments on appeal. First, they contend the district court erred in granting Banclnsure summary judgment because the policy does not unambiguously exclude coverage of the FDIC-R’s claims against the director-defendants. Second, they argue the district [1233]*1233court abused its discretion in declining to apply the doctrine of judicial estoppel. We address these arguments in turn.
A. Coverage Under the Policy
We review a grant of summary judgment de novo, applying the same standard as the district court. Yousuf v. Cohlmia, 741 F.3d 31, 37 (10th Cir.2014). Summary judgment is, appropriate where “the mov-ant shows that there is no genuine dispute as to any material fact and the movant is entitled to judgment as a matter of law.” Fed.R.Civ.P. 56(a). In applying this standard, we view the factual record in the light most favorable to the non-moving party. Duvall v. Ga.-Pac. Consumer Prods., L.P., 607 F.3d 1255, 1259 (10th Cir.2010). The parties agree Kansas law applies to interpretation of the policy. Thus, we apply decisions of the Kansas Supreme Court and, where no controlling decision exists, consult other sources, including decisions of the Kansas Court of Appeals. See Wade v. EMCASCO Ins. Co., 483 F.3d 657, 665-66 (10th Cir.2007).
Under Kansas law, an insurance policy constitutes a contract, and the interpretation of a contract is a question of law. AMCO Ins. Co. v. Beck, 261 Kan. 266, 929 P.2d 162, 165 (1996). “The primary rule in interpreting written contracts is to ascertain the intent of the parties.” Liggatt v. Emp’rs Mut. Cas. Co., 273 Kan. 915, 46 P.3d 1120, 1125 (2002). In ascertaining the intent of the parties, Kansas courts consider the policy as a whole, rather than viewing provisions in isolation. Long v. St. Paul Fire & Marine Ins. Co., 589 F.3d 1075, 1082 (10th Cir.2009). Kansas courts interpret policy terms based on how a reasonably prudent insured would understand them. O’Bryan v. Columbia Ins. Grp., 274 Kan. 572, 56 P.3d 789, 793 (2002).
Where the language of an insurance policy is clear and unambiguous, we must apply it in its plain and ordinary sense. Warner v. Stover, 283 Kan. 453, 153 P.3d 1245, 1247 (2007). Thus, “[i]f the terms of the contract are clear, there is no room for rules of construction, and the intent of the parties is determined from the contract itself.” Liggatt, 46 P.3d at 1125; see also Marquis v. State Farm Fire & Cas. Co., 265 Kan. 317, 961 P.2d 1213, 1219 (1998). When an insurance contract is unambiguous, a court may not rewrite the contract for the parties; “[i]ts function is to enforce the contract as made.” Catholic Diocese of Dodge City v. Raymer, 251 Kan. 689, 840 P.2d 456, 459 (1992).
Where an insurance policy’s plain language is ambiguous, Kansas courts adopt the construction most favorable to the insured. O’Bryan, 56 P.3d at 792. A contract is ambiguous if it “containfs] provisions or language of doubtful or conflicting meaning, as gleaned from a natural and reasonable interpretation of its language.” Id. (citation omitted). Put otherwise, ambiguity arises when application of the rules of construction “leaves it genuinely uncertain which one of two or more meanings is the proper meaning.” Liggatt, 46 P.3d at 1125 (citation omitted). Courts “should not strain to create an ambiguity where, in common sense, there is none.” First Fin. Ins. Co. v. Bugg, 265 Kan. 690, 962 P.2d 515, 519 (1998).
Finally, although an insured has the burden to show coverage under the policy, an insurer has the duty to show that a specific provision of the policy excludes coverage. Baugher v. Hartford Fire Ins. Co., 214 Kan. 891, 522 P.2d 401, 409 (1974). Exclusions, when ambiguous, are interpreted narrowly against the draft[1234]*1234er and in favor of coverage. O’Bryan, 56 P.3d at 792. Bearing these principles in mind, we turn to the policy at issue and its relevant exclusions.
1. The Plain Meaning of the Insured v. Insured Exclusion Bars Coverage of Claims by the FDIC-R
The insured v. insured exclusion provides that the insurer “shall not be liable” for loss in connection with “a Claim by ... any other Insured Person, the Company, or any successor, trustee, as-signee or receiver of the Company.” App. 75-76. Thus, claims by “any ... receiver of the Company” are excluded from coverage. The term “receiver” is not defined under the contract; thus, we interpret the provision as it is commonly and ordinarily understood. Warner, 153 P.3d at 1247. Black’s Law Dictionary defines “receiver” as:
A disinterested person appointed by a court, or by a corporation or other person, for the protection or collection of property that is the subject of diverse claims (for example, because it belongs to a bankrupt or is otherwise being litigated).
Black’s Law Dictionary (10th ed.2014). Relatedly, the Federal Deposit Insurance Act, pursuant to which the FDIC was appointed as receiver, see 12 U.S.C. § 1821, defines “receiver” to “include[ ] a receiver, liquidating agent, conservator, commission, person, or other agency charged by law with the duty of winding up the affairs of a bank or savings association.” Id. § 18130').
Appellants do not dispute that the FDIC was the “receiver” of Columbian. Upon the Kansas State Bank Commissioner’s determination that Columbian was insolvent, the FDIC was appointed as receiver of the bank pursuant to Kansas and federal law. See Kan. Stat. Ann. § 9-1907; 12 U.S.C. § 1821(d)(2)(A). Nor do they dispute that the FDIC brought the claims at issue in its capacity as receiver of Columbian. See Aplt. FDIC Reply Br. 7; Aplee. Supp.App. 38.
Thus, the plain language of the insured v. insured exclusion appears to unambiguously bar coverage of claims by the FDIC-R against director-defendants. Other courts interpreting identical insured v. insured exclusions have reached the same conclusion. See Hawker v. BancInsure, Inc., No. 1:12-cv-01261-SAB, 2014 WL 1366201, at *5 (E.D.Cal. Apr. 7, 2014); Davis v. BancInsure, Inc., No. 3:12-cv-113-TCB, 2013 WL 1223696, at *9 (N.D.Ga. Mar. 20, 2013); see also FDIC v. BancInsure, Inc., No. CV 12-09882 DMG (MRWx), — F.Supp.3d-, -, 2014 WL 8583832, at *7 (C.D.Cal. June 16, 2014) (noting that “[t]he FDIC does not dispute that the [insured v. insured] Exclusion language, when considered alone, appears to apply to it”).
Of course, we do not read the insured v. insured exclusion in isolation, but as part of the policy as a whole. See Long, 589 F.3d at 1082. Appellants argue that when the language of the insured v. insured exclusion is read in light of other policy provisions, and Banclnsure’s prior statements, it is at least ambiguous whether it bars claims by the FDIC-R, and thus must be construed in favor of the insured. First, they contend that the shareholder derivative action exception renders the insured v. insured exclusion ambiguous as applied to claims by the FDIC-R. Second, they assert that the endorsement to the regulatory exclusion renders the insured v. insured ambiguous as applied to [1235]*1235claims by the FDIC-R. And finally, they argue that Banclnsure’s prior statements support coverage under the policy. We address these arguments in turn, ultimately concluding that none of them are persuasive.
2. The Shareholder Derivative Action Exception Does Not Render the Insured v. Insured Exclusion Ambiguous
First, Appellants argue that the shareholder derivative action exception to the insured v. insured exclusion renders the exclusion ambiguous as applied to claims by the FDIC-R. Aplt. FDIC Br. 22-24; Aplt. McCaffree Br. 43-46. The shareholder derivative action exception removes from the scope of the insured v. insured exclusion “a shareholder’s derivative action brought on behalf of the Company by one or more shareholders who are not Insured Persons and make a Claim without the cooperation or solicitation of any Insured Person or the Company.” App. 76.
Appellants do not argue that the shareholder derivative action exception applies, but instead contend that its presence “shows intent to cover actions similar to those brought by the FDIC-R.” Aplt. FDIC Reply Br. 11; see Aplt. MeCaffree Reply Br. 20. By statute, the FDIC-R succeeds to “all rights, titles, powers, and privileges” of not only a failed bank, but also “any stockholder, ... accountholder, [and] depositor” of the institution. 12 U.S.C. § 1821(d)(2)(A). Appellants argue that, because actions by the FDIC-R against directors “share certain common characteristics with a shareholder derivative action,” the insured v. insured exclusion is inapplicable, or at least ambiguous, as applied to such claims. Aplt. FDIC Br. 23.
Appellants cite a number of cases that have held that shareholder derivative action exceptions at least render ambiguous insured v. insured exclusions as applied to claims by the FDIC-R. See Aplt. FDIC Br. 23-24 & n. 10 (citing Am. Cas. Co. v. Sentry Fed. Sav. Bank, 867 F.Supp. 50, 59 (D.Mass.1994); Am. Cas. Co. v. FDIC, 791 F.Supp. 276, 278 (W.D.Okla.1992); Am. Cas. Co. v. Baker, 758 F.Supp. 1340, 1349-50 (C.D.Cal.1991); FDIC v. Nat’l Union Fire Ins. Co., 630 F.Supp. 1149, 1157 (W.D.La.1986); FDIC v. BancInsure, Inc., — F.Supp.3d at-, 2014 WL 8583832, at *7-9; Progressive Cas. Ins. Co. v. FDIC, No. 11-CV-14816, 2012 WL 8437693, at *3 (E.D.Mich. Sept. 24, 2012)).
However, all of these cases, save one,2 dealt with insured v. insured exclusions that did not explicitly apply to claims by a receiver of the company. The insured v. insured exclusions at issue in these cases applied to, for instance, “any claim made ... by any other Director or Officer or by the Institution ... except for a shareholders derivative action.” Am. Cas. Co., 791 F.Supp. at 277; see also Sentry Fed. Sav. Bank, 867 F.Supp. at 59 (same language); Baker, 758 F.Supp. at 1343 (same language); Nat’l Union Fire Ins. Co., 630 F.Supp. at 1152 (essentially same language). Thus, courts had to grapple with the question whether the receiver “stepped into the shoes” of the institution, such that [1236]*1236claims by the receiver were excluded as would be claims by the institution itself. Am. Cas. Co., 791 F.Supp. at 277; see Sentry Fed. Sav. Bank, 867 F.Supp. at 59.
Unsurprisingly, in the absence of clear language stating that claims by a receiver of the company were excluded, these courts found the exclusions at least ambiguous as to claims by a receiver, given the similarity of such claims to shareholder derivative actions. But, as latter decisions have recognized, these cases shed little light on whether an exclusion explicitly barring coverage for claims by a “receiver” of the company are ambiguous. See Hawker, 2014 WL 1366201, at *8-9 (“The insured versus insured exclusions in the cases cited by the FDIC did not include language expressly excluding claims brought by ‘receivers.’ ”); Davis, 2013 WL 1223696, at *9 (rejecting this line of authority because “none of the cases making up the ... view involved policy language expressly providing that the exclusion applied to successors, receivers, assignees and trustees”).
In fact, decisions finding insured v. insured provisions ambiguous as to claims by a receiver relied on the absence of policy language present here. See, e.g.,Am. Cas. Co. v. Fed. Sav. & Loan Ins. Corp., 704 F.Supp. 898, 901 (E.D.Ark.1989) (concluding that policy at issue was ambiguous in part because there was no “reference in the endorsement to successors, assigns, trustees or receivers”). For instance, the Western District of Oklahoma found that claims by the FDIC-R were not excluded based on the fact that “the exclusion provision contains no expressed reference to the FDIC or to any successors, assigns or receivers.” Am. Cas. Co., 791 F.Supp. at 278. “Such language,” the court explained, “could easily have been made a part of the policy exclusion if it was so intended.” Id.
The insuring agreement between Ban-clnsure and Columbian has done precisely that here, providing that claims by “any ... receiver of the Company” are excluded. While the presence of a shareholder derivative action exception may contribute to a finding of ambiguity absent such clear language, it cannot overcome the plain language of the policy. See Marquis, 961 P.2d at 1219 (“[I]f the language of the written instrument is clear, there is no room for rules of construction”). A contract is ambiguous under Kansas law, and thus interpreted in the manner most favorable to the insured, only when the court is left “genuinely uncertain” as to which of multiple meanings is the appropriate one. Liggatt, 46 P.3d at 1125. Here, we have no such uncertainty, and thus will not “strain to create an ambiguity where, in common sense, there is none.” Bugg, 962 P.2d at 519.3
3. The Regulatory Endorsement Does Not Render the Insured v. Insured Exclusion Ambiguous
Next, Appellants argue that the endorsement to the regulatory exclusion ren[1237]*1237ders the insured v. insured exclusion ambiguous as applied to claims by the FDIC-R. The endorsement amended the policy “by the deletion of’ the regulatory exclusion, which had previously excluded coverage for “any action or proceeding brought by or on behalf of any federal or state regulatory or supervisory agency or deposit insurance organization,” including actions “which any such Agency may bring as receiver.” App. 89. The endorsement further set an aggregate liability cap of $5,000,000 for claims brought by “any federal or state regulatory or supervisory agency or deposit insurance organization.” Id. Appellants offer several arguments why this endorsement at least created an ambiguity as to whether claims by the FDIC-R were covered under the policy.
First, Appellants contend that the maximum aggregate liability cap affirmatively provided coverage over claims previously excluded under the regulatory exclusion. Thus, they argue, under Kansas law, the endorsement prevails over the original printed provisions. Aplt. FDIC Br. 19-20; Aplt. McCaffree Br. 27-28 (citing Lindesmith v. Republic Mut. Fire Ins. Co., 189 Kan. 201, 368 P.2d 35, 38 (1962); Wise v. Westchester Fire Ins. Co., 463 F.2d 386, 389 (10th Cir.1972)). But we see no language in the endorsement that affirmatively grants coverage over all of those claims previously excluded by the regulatory exclusion. The removal of the regulatory exclusion permits such coverage, but does not require it, as removing an exclusion is not the same thing as affirmatively providing coverage. And the liability cap, like others within the policy, see Aplee. Supp. App. 2, simply sets a sub-limit of liability for certain claims — it does not suggest that all claims of such nature are covered notwithstanding other applicable exclusions.
The Kansas Court of Appeals has held that an endorsement only alters a policy “to the extent specifically called for in the explicit language of the endorsement.” Thornburg v. Schweitzer, 44 Kan.App.2d 611, 240 P.3d 969, 977 (2010). Here, there is no language — let alone explicit language — in the endorsement’s liability cap affirmatively providing coverage over those claims previously excluded. To the contrary, the endorsement’s explicit language suggests the opposite, as it makes clear that “[n]othing herein contained shall be held to vary, waive or extend any of the terms, conditions, provisions, agreements or limitations of the above mentioned policy other than as above stated.” 4 App. 89. In short, “[n]othing in the ... endorsement indicates that it replaces or super-cedes the general provisions and exclusions” of the policy. Thornburg, 240 P.3d at 977.
Next, Appellants argue that the endorsement at least shows “a clear intent to provide coverage” over actions previously excluded under the regulatory exclusion, creating a least an ambiguity as to coverage. Aplt. FDIC Br. 17; Aplt McCaffree Br. 23. Appellants cite no authority from Kansas courts suggesting the deletion of an exclusion gives rise to an inference of [1238]*1238coverage,5 and courts in different states disagree on whether such an inference is appropriate.6
We doubt the Kansas Supreme Court would endorse an inference of coverage based on the deletion of an exclusion.7 But even assuming arguendo that it would under some circumstances, we do not think it would do so here, where the endorsement clearly evinces the parties’ intent not to “vary” or “waive” any other limitations of the policy. Cf. Essex Ins. Co. v. Vincent, 52 F.3d 894, 897-98 (10th Cir.1995) (rejecting an inference of coverage from the deletion of an exclusion under Colorado law based on a similar endorsement provision). There is simply no indication in the endorsement that, by removing the regulatory exclusion, the parties sought to provide coverage over all regulatory actions, even those for which coverage was unambiguously barred by other exclusions.
Finally, Appellants assert that interpreting the insured v. insured exclusion to bar claims by the FDIC-R yields two impractical results. First, they assert this construction renders the regulatory endorsement meaningless. Aplt. McCaffree Br. 30. We disagree. The endorsement still permitted (subject to other exclusions) coverage over claims brought by regulatory agencies other than the FDIC as receiver, such as claims by the Securities and Exchange Commission, Equal Employment Opportunity Commission, or other federal or state agencies.8 See Davis, 2013 WL 1223696, at *11.
Relatedly, they assert this construction renders the language of the original regulatory exclusion — that claims by a “deposit insurance organization” and agency “as receiver” are excluded — superfluous, as such claims would already be excluded by the insured v. insured exclusion. They eon-[1239]*1239tend this violates the fundamental canon of construction that courts must strive to give meaning to every word in a contract. Aplt. MeCaffree Br. 32 (citing Dillard Dep’t Stores, Inc. v. State Dep’t of Human Res., 28 Kan.App.2d 229, 13 P.3d 358, 364 (2000)). But this canon of construction is not absolute. See Dillard, 13 P.3d at 364 (treating the canon as a preference); see also King v. Burwell, — U.S.-, 135 S.Ct. 2480, 2492, 192 L.Ed.2d 483 (2015) (“[O]ur preference for avoiding surplusage constructions is not absolute.” (citation omitted)). Notably, the Kansas Supreme Court has suggested that this canon cannot overcome the plain meaning of words. See State v. Sedillos, 279 Kan. 777, 112 P.3d 854, 858-59 (2005). This is especially so in the context of insurance policies, as they “are notorious for their simultaneous use of both belts and suspenders, and some overlap is to be expected.” Certain Interested Underwriters at Lloyd’s, London v. Stolberg, 680 F.3d 61, 68 (1st Cir.2012); see also United Nat’l Ins. Co. v. Waterfront N.Y. Realty Corp., 994 F.2d 105, 108-09 (2d Cir.1993) (rejecting the argument that overlap in insurance policy exclusions renders ambiguous otherwise unambiguous language). Here, the mere fact of overlap between the two exclusions does not introduce ambiguity into the plain language of the insured v. insured exclusion barring coverage of claims by “any ... receiver of the Company.”
4. Banclnsure’s Prior Statements Cannot Overcome the Plain Language of the Insured v. Insured Exclusion
Lastly, Appellants assert that we should consider internal and external statements made by Banclnsure suggesting coverage of claims by the FDIC-R under the regulatory endorsement. Aplt. FDIC Br. 27-33; Aplt. MeCaffree Br. 32-35. But a finding of ambiguity is a prerequisite to considering such extrinsic evidence under Kansas law. See Thoroughbred Assocs., L.L.C. v. Kansas City Royalty Co., L.L.C., 297 Kan. 1193, 308 P.3d 1238, 1247 (2013) (absent contractual silence or ambiguity, “extrinsic evidence is not admissible to contradict, alter, or vary the terms of a written instrument”). Because we conclude the insured v. insured exclusion unambiguously bars coverage of claims by the FDIC-R against director-defendants, we reject this argument.
B. Judicial Estoppel
Appellants next argue that the district court erred in concluding that Ban-clnsure was not judicially estopped from denying coverage of the FDIC-R’s claims against the director-defendants based on its answers to interrogatories in the Co-lumbian litigation. Aplt. FDIC Br. 32 n. 12; Aplt. MeCaffree Br. 35-43. The district court declined to apply the doctrine of judicial estoppel, and we review its determination for an abuse of discretion. Queen v. TA Operating, LLC, 734 F.3d 1081, 1086 (10th Cir.2013). A district court abuses its discretion “when it makes a clear error of judgment, exceeds the bounds of permissible choice, or when its decision is arbitrary, capricious or whimsical, or results in a manifestly unreasonable judgment.” Id. (internal quotation marks omitted).
The doctrine of judicial estop-pel is designed “to protect the integrity of the judicial process by prohibiting parties .from deliberately changing positions according to the exigencies of the moment.” New Hampshire v. Maine, 532 U.S. 742, 749-50, 121 S.Ct. 1808, 149 L.Ed.2d 968 (2001) (internal quotation marks and cita[1240]*1240tion omitted). The circumstances in which judicial estoppel applies are “not reducible to any general formulation of principle,” id. at 750, 121 S.Ct. 1808; nevertheless, the Supreme Court has identified three relevant factors. First, courts ask whether a party’s later position is “clearly inconsistent” with its former position. Id. Second, courts ask whether the party “succeeded in persuading a court to accept that party’s earlier position, so that judicial acceptance of an inconsistent position in a later proceeding would create the perception that either the first or the second court was misled.” Id. (internal quotation marks omitted). And third, courts consider “whether the party seeking to assert an inconsistent position would derive an unfair advantage or impose an unfair detriment on the opposing party if not estopped.” Id. at 751, 121 S.Ct. 1808; see also Eastman v. Union Pac. R.R. Co., 493 F.3d 1151, 1156 (10th Cir.2007).
This circuit applies the doctrine of judicial estoppel “both narrowly and cautiously.” Hansen v. Harper Excavating, Inc., 641 F.3d 1216, 1227 (10th Cir.2011) (quoting Bradford v. Wiggins, 516 F.3d 1189, 1194 n. 3 (10th Cir.2008)). We do so because “judicial estoppel is a powerful weapon ... and there are often lesser weapons that can keep alleged inconsistent statements in check while preserving a party’s option to have its day in court.” Vehicle Mkt. Research, Inc. v. Mitchell Int’l, Inc., 767 F.3d 987, 993 (10th Cir.2014). Notably, we have held that judicial estoppel only applies when the position to be estopped is one of fact, not one of law. See United States v. Villagrana-Flores, 467 F.3d 1269, 1279 (10th Cir.2006) (“[T]he existence of a Fourth Amendment violation is a legal position, not a factual one, and therefore the first judicial estoppel factor has not been satisfied.”); Kaiser v. Bowlen, 455 F.3d 1197, 1204 (10th Cir.2006) (“The stance taken in the tax return cannot give rise to judicial estoppel: in it, the Partnership is taking a legal position, not a factual one.”); Johnson v. Lindon City Corp., 405 F.3d 1065, 1069 (10th Cir.2005) (“The requirement that a previous court has accepted the prior inconsistent factual position ensures that judicial estoppel is applied in the narrowest of circumstances.” (internal quotation marks and citation omitted)); see also Emergency One, Inc. v. Am. Fire Eagle Engine Co., 332 F.3d 264, 274 (4th Cir.2003) (“Judicial estoppel applies if the party to be estopped intentionally asserts a position of fact that is inconsistent with a factual position taken during previous litigation.”).9
[1241]*1241Appellants seek to have Banclnsure judicially estopped from asserting that claims by the FDIC-R against the director-defendants are not covered under the policy. But whether such claims are covered under the policy is a question of law, not fact. See AMCO Ins. Co., 929 P.2d at 165. Thus, under this court’s precedent, the doctrine of judicial estoppel is inapplicable,10 and the district court did not abuse its discretion in declining to apply it.
AFFIRMED.