Commitments and Contingencies	9 Months Ended
Sep. 30, 2013
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	Commitments and Contingencies To meet the financing needs of its customers, BancShares and its subsidiaries have financial instruments with off-balance sheet risk. These financial instruments include commitments to extend credit, standby letters of credit and recourse obligations on mortgage loans sold. These instruments involve elements of credit, interest rate or liquidity risk. Commitments to extend credit are legally binding agreements to lend to customers. Commitments generally have fixed expiration dates or other termination clauses and may require payment of fees. Since many of the commitments are expected to expire without being drawn upon, the total commitment amounts do not necessarily represent future liquidity requirements. Established credit standards control the credit risk exposure associated with these commitments. In some cases, BancShares requires that collateral be pledged to secure the commitment, including cash deposits, securities and other assets. At September 30, 2013, BancShares had unused commitments totaling $5,788,492, compared to $5,467,998 at December 31, 2012. Standby letters of credit are commitments guaranteeing performance of a customer to a third party. Those guarantees are issued primarily to support public and private borrowing arrangements. To minimize its exposure, BancShares’ credit policies govern the issuance of standby letters of credit. At September 30, 2013, and December 31, 2012, BancShares had standby letters of credit amounting to $56,941 and $63,085, respectively. The credit risk related to the issuance of these letters of credit is essentially the same as that involved in extending loans to clients and, therefore, these letters of credit are collateralized when necessary. Residential mortgage loans are sold with standard representations and warranties relating to documentation and underwriting requirements for the loans. If deficiencies are discovered at any point in the life of the loan, the investor may require BancShares to repurchase the loan. As of September 30, 2013, and December 31, 2012, other liabilities included a reserve of $3,641 and $4,065, respectively, for estimated losses arising from the repurchase of loans under these provisions. In addition to standard representations and warranties, residential mortgage loans sold with limited recourse liability represent guarantees to repurchase the loans or repay a portion of the sale proceeds in the event of nonperformance by the borrower. The recourse period is generally 120 days or fewer after sale. At September 30, 2013, and December 31, 2012, BancShares has sold loans of approximately $200,379 and $205,888, respectively, for which the recourse period had not yet elapsed. BancShares has recorded a receivable from the FDIC for the expected reimbursement of losses on assets covered under the various loss share agreements. These loss share agreements impose certain obligations on us that, in the event of noncompliance, could result in the delay or disallowance of some or all of our rights under those agreements. Requests for reimbursement are subject to FDIC review and may be delayed or disallowed for noncompliance. The loss share agreements are subject to interpretation by both the FDIC and FCB, and disagreements may arise regarding coverage of losses, expenses and contingencies. The loss share agreements for four FDIC-assisted transactions include provisions related to contingent payments that may be owed to the FDIC at the termination of the agreements (clawback liability).The clawback liability represents an estimated payment by BancShares to the FDIC if actual cumulative losses on acquired covered assets are lower than the cumulative losses originally estimated by the FDIC at the time of acquisition. The clawback liability is estimated by discounting estimated future payments and is recorded in the Consolidated Balance Sheets as a payable to the FDIC for loss share agreements. As of September 30, 2013, and December 31, 2012, the clawback liability was $107,419 and $101,641, respectively. BancShares and various subsidiaries have been named as defendants in legal actions arising from their normal business activities in which damages in various amounts are claimed. BancShares is also exposed to litigation risk relating to the prior business activities of banks from which assets were acquired and liabilities assumed in the various FDIC-assisted transactions. Although the amount of any ultimate liability with respect to such matters cannot be determined, in the opinion of management, any such liability will not have a material effect on BancShares’ consolidated financial statements. On February 18, 2011, United Western Bank, United Western Bank's parent company, United Western Bancorp, and five of their directors filed a complaint in the United States District Court for the District of Columbia against the Office of Thrift Supervision (OTS), its Acting Director and the FDIC in its corporate and receivership capacities, alleging that the seizure of United Western Bank by the OTS and the subsequent appointment of the FDIC as receiver were illegal. The complaint requested the court to direct the OTS to remove the FDIC as receiver and return control of United Western Bank to the plaintiffs. Neither BancShares nor FCB was named as a party. In June 2011, the Court dismissed all plaintiffs other than United Western Bank and dismissed the FDIC in both capacities, leaving United Western Bank and the OTS and its Acting Director as the only parties. In July 2011, following passage of the Dodd-Frank Act, the Office of the Comptroller of the Currency (OCC) and the Acting Comptroller were substituted for the OTS and its Acting Director as the only defendants. On March 5, 2013, the court entered a final, appealable order denying United Western Bank's Motion for Summary Judgment and granting OCC's and the Comptroller's Motion for Summary Judgment. On April 26, 2013, United Western Bank filed its Notice of Appeal to the U.S. Court of Appeals for the District of Columbia. On June 20, 2013, United Western Bank filed a Motion for the Voluntary Dismissal of its appeal. The Motion was granted and the appeal was dismissed on July 3, 2013. During March 2012, FCB received communications from the US Small Business Administration (SBA) asserting that the SBA is entitled to receive a share of amounts paid or to be paid by the FDIC to FCB relating to certain specific SBA-guaranteed loans pursuant to the loss share agreement between FCB and the FDIC applicable to Temecula Valley Bank. FCB disputes the validity of the SBA claims and is pursuing administrative relief through the SBA. During the second quarter of 2013, SBA advised that it will no longer pursue this claim.

Commitments and Contingencies

To meet the financing needs of its customers, BancShares and its subsidiaries have financial instruments with off-balance sheet risk. These financial instruments include commitments to extend credit, standby letters of credit and recourse obligations on mortgage loans sold. These instruments involve elements of credit, interest rate or liquidity risk.

Commitments to extend credit are legally binding agreements to lend to customers. Commitments generally have fixed expiration dates or other termination clauses and may require payment of fees. Since many of the commitments are expected to expire without being drawn upon, the total commitment amounts do not necessarily represent future liquidity requirements. Established credit standards control the credit risk exposure associated with these commitments. In some cases, BancShares requires that collateral be pledged to secure the commitment, including cash deposits, securities and other assets. At September 30, 2013, BancShares had unused commitments totaling $5,788,492, compared to $5,467,998 at December 31, 2012.

Standby letters of credit are commitments guaranteeing performance of a customer to a third party. Those guarantees are issued primarily to support public and private borrowing arrangements. To minimize its exposure, BancShares’ credit policies govern the issuance of standby letters of credit. At September 30, 2013, and December 31, 2012, BancShares had standby letters of credit amounting to $56,941 and $63,085, respectively. The credit risk related to the issuance of these letters of credit is essentially the same as that involved in extending loans to clients and, therefore, these letters of credit are collateralized when necessary.

Residential mortgage loans are sold with standard representations and warranties relating to documentation and underwriting requirements for the loans. If deficiencies are discovered at any point in the life of the loan, the investor may require BancShares to repurchase the loan. As of September 30, 2013, and December 31, 2012, other liabilities included a reserve of $3,641 and $4,065, respectively, for estimated losses arising from the repurchase of loans under these provisions.

In addition to standard representations and warranties, residential mortgage loans sold with limited recourse liability represent guarantees to repurchase the loans or repay a portion of the sale proceeds in the event of nonperformance by the borrower. The recourse period is generally 120 days or fewer after sale. At September 30, 2013, and December 31, 2012, BancShares has sold loans of approximately $200,379 and $205,888, respectively, for which the recourse period had not yet elapsed.

BancShares has recorded a receivable from the FDIC for the expected reimbursement of losses on assets covered under the various loss share agreements. These loss share agreements impose certain obligations on us that, in the event of noncompliance, could result in the delay or disallowance of some or all of our rights under those agreements. Requests for reimbursement are subject to FDIC review and may be delayed or disallowed for noncompliance. The loss share agreements are subject to interpretation by both the FDIC and FCB, and disagreements may arise regarding coverage of losses, expenses and contingencies.

The loss share agreements for four FDIC-assisted transactions include provisions related to contingent payments that may be owed to the FDIC at the termination of the agreements (clawback liability).The clawback liability represents an estimated payment by BancShares to the FDIC if actual cumulative losses on acquired covered assets are lower than the cumulative losses originally estimated by the FDIC at the time of acquisition. The clawback liability is estimated by discounting estimated future payments and is recorded in the Consolidated Balance Sheets as a payable to the FDIC for loss share agreements. As of September 30, 2013, and December 31, 2012, the clawback liability was $107,419 and $101,641, respectively.

BancShares and various subsidiaries have been named as defendants in legal actions arising from their normal business activities in which damages in various amounts are claimed. BancShares is also exposed to litigation risk relating to the prior business activities of banks from which assets were acquired and liabilities assumed in the various FDIC-assisted transactions. Although the amount of any ultimate liability with respect to such matters cannot be determined, in the opinion of management, any such liability will not have a material effect on BancShares’ consolidated financial statements.

On February 18, 2011, United Western Bank, United Western Bank's parent company, United Western Bancorp, and five of their directors filed a complaint in the United States District Court for the District of Columbia against the Office of Thrift Supervision (OTS), its Acting Director and the FDIC in its corporate and receivership capacities, alleging that the seizure of United Western Bank by the OTS and the subsequent appointment of the FDIC as receiver were illegal. The complaint requested the court to direct the OTS to remove the FDIC as receiver and return control of United Western Bank to the plaintiffs. Neither BancShares nor FCB was named as a party. In June 2011, the Court dismissed all plaintiffs other than United Western Bank and dismissed the FDIC in both capacities, leaving United Western Bank and the OTS and its Acting Director as the only parties. In July 2011, following passage of the Dodd-Frank Act, the Office of the Comptroller of the Currency (OCC) and the Acting Comptroller were substituted for the OTS and its Acting Director as the only defendants. On March 5, 2013, the court entered a final, appealable order denying United Western Bank's Motion for Summary Judgment and granting OCC's and the Comptroller's Motion for Summary Judgment. On April 26, 2013, United Western Bank filed its Notice of Appeal to the U.S. Court of Appeals for the District of Columbia. On June 20, 2013, United Western Bank filed a Motion for the Voluntary Dismissal of its appeal. The Motion was granted and the appeal was dismissed on July 3, 2013.

During March 2012, FCB received communications from the US Small Business Administration (SBA) asserting that the SBA is entitled to receive a share of amounts paid or to be paid by the FDIC to FCB relating to certain specific SBA-guaranteed loans pursuant to the loss share agreement between FCB and the FDIC applicable to Temecula Valley Bank. FCB disputes the validity of the SBA claims and is pursuing administrative relief through the SBA. During the second quarter of 2013, SBA advised that it will no longer pursue this claim.