OPINION
Plaintiff Nationwide Mutual Insurance Company (“Nationwide”) appeals a district court order denying its application for va-catur of a final arbitration award issued in this reinsurance dispute with defendant Home Insurance Company (“Home”). For the reasons set forth below, we affirm the judgment of the district court confirming the award.
I.
This long-running dispute originated in 1995, when Nationwide filed suit against Home for breach of a reinsurance contract that the parties had originally entered into in 1977. The district court referred the parties to arbitration pursuant to the terms of an arbitration clause in the reinsurance аgreement. Numerous interim decisions of the arbitration panel were thereafter challenged in the district court, and, in fact, this is the fourth time this matter has come before the Sixth Circuit for review. The extensive procedural history and involvement of this Court is found at
Nationwide Mut. Ins. Co. v. Home Ins. Co.,
After this Court’s decision in Nationwide III, the parties proceeded to the third phase of arbitration, culminating in a merits hearing. On July 17, 2003, the three-member arbitration pаnel 1 rendered its unanimous final decision which, in pertinent part, awarded Home the sum of $1,250,000 in costs and interest. 2
*643 Nationwide filed suit in district court to vacate the final award and two interim rulings rendered by the arbitration panel. In the alternative, Nationwide sought vacation of the interim rulings and Paragraphs 9 and 11 of the final decision granting Home’s request for recovery of its “fronting share administrative costs” (FSAC) and part of its costs in the arbitration. Home opposed the vacatur application and sought confirmation of the final order.
On September 24, 2004, the district court issued an opinion and order, denying Nationwide’s vacatur application, granting Home’s cross-motion for confirmation of the arbitration award, and entering a final judgment in favor of defendant Home Insurance.
Nationwide now appeals the district court’s denial of its vacatur application, primarily on the ground of evident partiality based on an arbitrator’s alleged nondisclosure of certain business and social relationships with Home.
II.
The Federal Arbitration Act (“FAA”) expresses a presumption that arbitration awards will be confirmed. 9 U.S.C. § 9;
Andersons, Inc. v. Horton Farms, Inc.,
III.
A.
In the district court, Nationwide sought to vacate the final award of the second arbitration panel on the ground that the Home-appointed arbitrator, Ronald Jacks, displayed evident partiality contrary to subsection 10(a)(2) of the FAA, 9 U.S.C. § 10(a)(2). Nationwide also alleged that Jacks engaged in improper
ex parte
contacts with one of Home’s attorneys and with employees of ACE/INA Holdings, Inc., and CIGNA Corporation (“ACE/CIGNA”).
3
Specifically, Nationwide alleged that during the course of arbitration Jacks failed to disclose certain business and social relationships with Home and its counsel.
4
Relying on
Apperson v. Fleet Carrier Corp.,
Nationwide now contends that, in assessing the effects of Jacks’ alleged non-disclosures, the district court applied the wrong standard. Nationwide urges this Court to limit application of the
Apperson
standard to so-called “actual bias” cases, where the evident partiality claim is based on facts known or disclosed and objected to by the challenging party prior to or during the arbitration. Citing
Commonwealth Coatings Corp. v. Continental Casualty Co.,
*645
In
Apperson,
this Court, addressing allegations of “evident partiality” in the context of the arbitration of a labor contract dispute,
6
adopted the objective test utilized by the Court of Appeals for the Second Circuit in
Morelite Construction Corp. v. New York City Dist. Council Carpenters Benefit Funds,
Consequently, “[u]nder
Apperson,
the party seeking invalidation must demonstrate more than an amorphous institutional predisposition toward the other side; a lesser showing would be tantamount to an ‘appearance of bias’ standard.”
Andersons, Inc.,
We have since reiterated and followed the
Apperson
standard in
Nationwide II,
The arbitration agreement in this case requires that the arbitrators come from within the insurance industry and further provides for a tripartite panel consisting of two party-appointed arbitrators and one neutral umpire.
See Nationwide Mut. Co. v. Home Ins. Co.,
Home’s party-appointed arbitrator, Ronald Jacks, who is the focus of the present case, has extensive experience serving as an international reinsurance arbitrator, a fact noted by the Seventh Circuit in
Sphere Drake,
Industry arbitration, the modern law merchant, often uses panels composed of industry insiders, the better to understand the trade’s norms of doing business and the consequences of proposed lines of decision. See Lisa Bernstein, Private Commercial Law in the Cotton Industry: Creating Cooperation Through Rules, Norms, and Institutions, 99 Mich. L.Rev. 1724, 1728 (2001). The more experience the panel has, and the smaller the number of repeat players, the more likely it is that the panel will contain some actual or potential friends, counselors, or business rivals of the parties. Yet all participants may think the expertise-impartiality tradeoff worthwhile; the Arbitration Act does not fasten on every industry the model of the disinterested generalist judge.
Id. at 620 (emphasis added).
The Sphere Drake court, acknowledging these industry practices and the fact that “only, evident partiality, not appearances or risks, spoils an award,” id. at 621, concluded that Jacks’ prior engagement did not demonstrate evident partiality within the meaning of § 10(a)(2):
Let us suppose that the district judge’s inferences are sound — that Jacks spent two months of equivalent full-time service as counsel for Sphere Drake in an international insurance arbitration, four years before the unrelated arbitration with All American. Even if Jacks had been the umpire, this would not have implied “evident partiality.” Indeed, Jacks could have served as a federal judge in this case without challenge on grounds of partiality, and the scope of disqualification under § 10(a)(2) is con *647 siderably more confined than the rule applicable to judges.
Id.
The Sphere Drake court further held that, even assuming arguendo that Jacks had not adequately disclosed the extent of his involvement in the prior, unrelated proceedings, this nondisclosure alone did not demonstrate evident partiality:
Commonwealth Coatings did not hold ... that disclosure is compulsory for its own sake, and its absence fatal even if the arbitrator meets judicial standards of impartiality ____ Nor did Commonwealth Coatings so much as hint that party-appointed arbitrators are governed by the norms under which neutrals operate. The point of Commonwealth Coatings is that the sort of financial entanglements that would disqualify a judge will cause problems for a neutral under § 10(a)(2) unless disclosure is made and the parties’ consent obtained.
Id. at 623.
The Seventh Circuit’s well-reasoned decision in
Sphere Drake
reinforces our conclusion that we should continue to adhere to the
Apperson
standard in this case, where evident partiality based on the alleged nondisclosure of material relationships by a party-appointed arbitrator is claimed. In formulating the objective standard now used by the Sixth Circuit, the
Morelite
court, like the Seventh Circuit in
Sphere Drake,
was cognizant of the practices and norms peculiar to industry arbitration and incorporated these considerations in its analysis.
Given the arbitration format voluntarily chosen by the parties in this case, to permit vacatur based upon the mere “appearance of bias” of a party-appointed arbitratоr “would be to render this efficient means of dispute resolution ineffective in many commercial settings.”
Morelite,
B.
During an October 1999 organization meeting with the arbitration panel, the panel members disclosed their contracts and connections with each other, the parties, and the parties’ attorneys. Arbitrator Jacks, a retired lawyer, disclosed that he had no prior involvement with Nationwide, but stated that he had served as Home’s arbitrator on six matters over *648 twenty years, and as opposing arbitrator twice. Jacks further stated that he had “served on a number of occasions in the last 20 years as a party arbitrator to CIG-NA, and with regard to ACE, I represented ACE when ... I was actively practicing law.” At the time of the arbitration, Jacks’ law firm was outside general counsel for ACE, “but I have no continuing involvement in that representation.” He disclosed that he had been a party arbitrator for his firm’s clients in eighteen arbitra-tions over a period of more than twenty years; he was opposing party arbitrator in three or four cases; he served as an umpire in two cases; and he was currently serving as an expert for one of their clients. Jacks opined at that time that he would accept future engagements with ACE/CIGNA if he thought it was appropriate.
Over the next two years, no additional disclosures were made by the arbitrators. In November 2001, Nationwide’s attorney wrote the arbitrators requesting that each update their disclosures. Jacks promptly replied, noting his appointment as an arbitrator for ACE in an unrelatеd matter. Nationwide did not object to Jacks’ service at the time of the disclosure. Further details of his involvement were sent by Jacks in January 2002 upon Nationwide’s request. Specifically, Jacks disclosed that he served approximately twenty times over a twenty-three year period as an arbitrator appointed by ACE or CIGNA.
Nationwide took no further action regarding Jacks’ supplemental disclosures until after the United States District Court for the Northern District of Illinois issued its decision in
Sphere Drake,
finding evident partiality on the part of Jacks in an unrelated arbitration.
Sphere Drake Ins. Ltd. v. All Am. Life Ins. Co.,
No. 01-C-5226,
These facts would not, in our opinion, lead a reasonable person to conclude that Jacks was partial to one side of the arbitration. As the district court noted, this is not even a case of nondisclosure, as Nationwide argues; rather, Jacks made full and timely disclosures regarding his business relationship with Home and ACE/CIGNA. These disclosures were not *649 deficient, and Nationwide otherwise has failed to show with specificity how the substance of these disclosures pertaining to Jacks’ continued service in the reinsurance industry, and his prior and ongoing contacts with Home and ACE/CIGNA in numerous unrelаted matters, manifest evident partiality pursuant to 9 U.S.C. § 10(a)(2) and are “powerfully suggestive of bias” in the present matter.
We likewise agree with the district court that Jacks’ social engagements did not constitute improper or prohibited
ex parte
contacts. These events did not involve any communication regarding the Nationwide-Home arbitration. Certainly, arbitrators and attorneys frequently participate in activities that result in communication unrelated to the subject matter of litigation before the arbitrator,
Morelite,
We therefore conclude, on the basis of the above record, ■ that the district court did not clearly err in denying Nationwide’s application for vacatur based on the allegations of evident partiality on the part of arbitrator Jacks.
rv.
In a related argument, Nationwide contends that it had a contractual right to withdraw its consent to the second panel’s authority because Jacks’ disclosures rendered him unacceptable to Nationwide, and, having purported to do so, the second panel acted in excess of its authority contrary to 9 U.S.C. § 10(a)(4) when it rendered the final award. Nationwide’s argument lacks merit.
First, as the district court properly held, because Jacks’ disclosures were not in fact deficient, Nationwide’s contention that the second panel somehow exceeded its authority in continuing to hear the arbitration is baseless. Second, the contractual provision which purportedly legitimizes such withdrawal in fact merely preserves the right of either party to seek the vacation of the arbitration panel’s award except as to fully disclosed and accepted conflicts of interest. 11 The provision does not sanctiоn the unilateral withdrawal of support for the panel that would effectively dismantle the ongoing arbitration process. Accordingly, Nationwide could avail itself of no governing contractual right to withdraw its consent to the second panel’s authority.
V.
Finally, Nationwide contends that the second arbitration panel exceeded its *650 authority when it issued, as part of the final award, “fronting share administrative costs” (“FSAC”) to Home. Pursuant to the terms of the underwriting agreements for the participants of the Rutty pool, 12 Rutty agreed to underwrite risks on behalf of each pool member. The pool members were each responsible for a percentage of pool liabilities in exchange for the same percentage of pool revenues. The percentage was fixed annually and was referred to as each pool member’s “fixed quota share.” The pool members could also act as fronting companies, whereby the cedents and insureds of the pool would receive contracts issued in the name of one or more pool members but not in the name of all pool members. Consistent with the terms of the underwriting agreements, however, the actual risks аnd premiums were still divided among the pool members based on each pool member’s fixed quota share. Consequently, because the contracts between the insureds and cedents of the pool and the issuing companies did not include some pool members, the contingent liability of the fronting companies to the insured or cedent was almost always higher than their respective fixed quota shares.
Nationwide contends that, pursuant to the underwriting agreements, the pool was administered solely on the basis of each pool member’s fixed quota share; thus, the panel’s award to Hоme for its FSAC costs falls outside the ambit of the reinsurance contract.
Nationwide’s argument is one of arbitrability. As previously noted, the FAA, 9 U.S.C. § 10, provides for limited judicial review of arbitration awards. The burden of proving that the arbitrators exceeded their authority is great.
Nationwide III,
We have previously characterized the arbitration clause in this reinsurance contract as a “broad” one.
Nationwide I,
*651
Nationwide’s argument that vacatur is warranted as to the remaining costs and expenses awarded to Home by the arbitration panel is similarly without basis in the record. Arbitrators are not required to explain their decisions.
Dawahare,
VI.
For the foregoing reasons, we affirm the district court’s order denying Nationwide’s vacatur application, granting Home’s cross-motion for confirmation of the arbitration award, and entering final judgment in favor of defendant Home Insurance Company.
Notes
. This was the second arbitration panel to be appointed in this matter, following the resignаtion of the initial panel members.
See Nationwide III,
. The complete text of the panel's final decision states as follows:
1. Contract R is a contract of reinsurance.
2. The Addendum to Contract R, by necessary inference, imposed on Home a duty to supervise Rutty’s inward and outward claim handling in respect of Nationwide's fixed pool share only but not a duty to otherwise replace Nationwide in the runoff or to fund Rutty.
3. In relation to Nationwide's fixed pool share of inward and outward claims, Home and Rutty agreed to deal only with each other. In relation to all other matters, Nationwide retained responsibility to supervise Rutty.
4. Home had a duty to pay aсcounts within a reasonable time from receipt. In that regard, Home also had the right to make reasonable inquiries and conduct reasonable inspections.
5. In exercising those rights and fulfilling those duties, Home was obligated to act in good faith and with fair dealing.
6. Although many of Home's queries and inspections were appropriate and legitimate, others were excessive and inappropriate. Likewise, many of Home's claim payments were timely but others were not. *643 To the extent that some queries and inspections were excessive, and to the extent that some claim payments (including the Excess claim) were untimely, they constituted breaches of duty by Home.
7. Home's breaches of ■ duty did not amount to bad faith.
8. Nationwide has failed in most respects to sustain its burden of demonstrating specific damages flowing from specific breaches by Home. The Panel nevertheless believes that some damage necessarily resulted from Home's breaches, and concludes in its discretion that it would be wrong to deprive Nationwide of any recovery at all. We accordingly award to Nationwide the sum of $750,000 in respect of Home's breaches of duty.
9. Home is awarded the sum of $1,250,000 in respect of its counterclaims for administrativе costs and interest.
10. Nationwide is awarded a contribution from Home of $500,000 toward Nationwide's costs.
11. Home is awarded a contribution from Nationwide of $1,250,000 toward Home’s costs.
12. ■ All other claims and counterclaims between the parties are dismissed.
. In 1983, Home sold part of its business, including the reinsurance contract at issue, to CIGNA (now ACE), which performed its obligations to Nationwide through a subsidiary, AISUK.
See Nationwide III,
. In June 2002, Jacks, one of Home’s attorneys, and their wives had dinner to celebrate a birthday. Jacks also had contact with one or two ACE employees concerning a recent arbitration in which ACE had appointed him as a mediator. In June 2002, he also had a very brief conversation, apparently about the weather and politics, with ACE’s CEO at the School of Risk Management's annual New York dinner.
. In
Commonwealth Coatings,
a divided court addressed the issue of "evident partiality." A neutral arbitrator failed to disclose that he had engaged in periodic and significant business relationships with the successful party to the arbitration, including services related to the subject of the arbitration, and had been paid approximately $12,000 by the party in consulting fees.
. Although the FAA exempts labor contracts from its purview, the
Apperson
Court looked to the FAA for guidance and utilized the "evident partiality” standard of subsection 10(a)(2) [formerly subsection 10(b)] in reviewing the bias claims.
Apperson,
. The
Morelite
court, “[m]indful of the tradeoff between expertise and impartiality, and cognizant of the voluntary nature of stibmit-ting to arbitration,” interpreted еvident partiality "as requiring a showing of something more than the mere ‘appearance of bias' to vacate an arbitration award,” yet not as insurmountable as "proof of actual bias.”
.As the Seventh Circuit aptly observed in
Merit Insurance Co.,
The different weighting of impartiality and expertise in arbitration compared to adjudication is dramatically illustrated by the practice whereby each party appoints one of the arbitrators to be his representative rather than a genuine umpire. See Note, The Use of Tripartite Boards in Labor, Commercial, and International Arbitration, 68 Harv.L.Rev. 293 (1954). No one would dream of having a judicial pаnel composed *646 of one part-time judge and two representatives of the parties, but that is the standard arbitration panel, the panel Leatherby chose — presumably because it preferred a more expert to a more impartial tribunal'— when it wrote an arbitration clause into its reinsurance contract with Merit.
If Leatherby had wanted its dispute with Merit resolved by an Article III judge (to whom it had access under the diversity jurisdiction), it would not have inserted an arbitration clause in the contract, or having done so move for arbitration against Merit’s wishes. Leatherby wanted something differеnt from judicial dispute resolution. It wanted dispute resolution by experts in the insurance industry, who were bound to have greater knowledge of the parties, based on previous professional experience, than an Article III judge, or a jury. "The parties to an arbitration choose their method of dispute resolution, and can ask no more impartiality than inheres in the method they have chosen." Cf. Am. Almond Products Co. v. Consol. Pecan Sales Co.,144 F.2d 448 , 451 (2d Cir.1944) (L.Hand, J.).
. Nationwide cites
Olson v. Merrill Lynch, Pierce, Fenner & Smith, Inc.,
. As previously noted, the Seventh Circuit ultimately reversed the district court’s decision.
Sphere Drake,
. Nationwide bases its argument on language found in the Hold Harmless Agreement, whereby both parties agreed that neither would hold the arbitration panel members liable in connection with their arbitration service. At the conclusion of the agreement, the following language appears:
Nothing in this stipulation, however, shall abridge any rights the Petitioner and Respondent may have with respect to each other to seek the vacation ... of any ... Award which the Panel may render except in regard to any conflicts of interest fully disclosed to the parties at the Organization Meeting, or thereafter and accepted by the parties.
(J.A. at 471, 473-74, 530.)
Nationwide alleges that this final exception language, for which it specifically negotiated, gives Nationwide the right to withdraw upon the subsequent disclosure of any arbitrator conflict for which Nationwide withholds its approval. Nationwide’s argument is contrary to both the language and the context of the clause. The clause merely reserves Nationwide's normal rights to seek vacatur of the arbitration award, while circumscribing those rights somewhat by disallowing either party to seek vacatur on the grounds of conflict of interest, when such a contention is premised on a conflict fully disclosed and agreed to by the parties.
. See
Nationwide I,
. Home filed counterclaims seeking approximately $1,700,000 for costs incurred in administering Nationwide’s fronted liability and $370,000 in interest on balances Home advanced on Nationwide’s behalf for payments Home made to Nationwide's cedents on contracts Nationwide fronted for the pool.
