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rivativeAverageFixedInterestRate":{"label":"Derivative, 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Home Loan Bank Advances","description":"Amount of Federal Home Loan Bank (FHLBank) advances to member financial institutions.","units":{"USD":[{"end":"2010-12-31","val":-57434000,"accn":"0000914317-11-001265","fy":2011,"fp":"Q2","form":"10-Q/A","filed":"2011-09-14"},{"end":"2010-12-31","val":-57434000,"accn":"0000914317-11-001488","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-14"},{"end":"2010-12-31","val":-57434000,"accn":"0000914317-12-000336","fy":2011,"fp":"FY","form":"10-K","filed":"2012-03-15","frame":"CY2010Q4I"},{"end":"2011-06-30","val":-59124000,"accn":"0000914317-11-001265","fy":2011,"fp":"Q2","form":"10-Q/A","filed":"2011-09-14","frame":"CY2011Q2I"},{"end":"2011-09-30","val":-55124000,"accn":"0000914317-11-001488","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-14","frame":"CY2011Q3I"},{"end":"2011-12-31","val":-50124000,"accn":"0000914317-12-000336","fy":2011,"fp":"FY","form":"10-K","filed":"2012-03-15","frame":"CY2011Q4I"},{"end":"2013-12-31","val":6920000,"accn":"0000914317-14-000330","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-17"},{"end":"2013-12-31","val":6920000,"accn":"0001213900-15-002235","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-31","frame":"CY2013Q4I"},{"end":"2014-12-31","val":2458000,"accn":"0001213900-15-002235","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-31","frame":"CY2014Q4I"}]}},"FederalHomeLoanBankAdvancesBranchOfFHLBBankWeightedAverageInterestRate":{"label":"Federal Home Loan Bank, Advances, Branch of FHLB Bank, Weighted Average Interest Rate (Deprecated 2016-01-31)","description":"Describes the weighted average interest rate applicable to the specific advances from the Federal Home Loan Bank, by branch, as of the Balance Sheet date.","units":{"pure":[{"end":"2011-12-31","val":0.0277,"accn":"0000914317-13-000322","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-15","frame":"CY2011Q4I"},{"end":"2012-12-31","val":0.0274,"accn":"0000914317-13-000322","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-15"},{"end":"2012-12-31","val":0.0274,"accn":"0000914317-14-000330","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-17","frame":"CY2012Q4I"},{"end":"2013-12-31","val":0.0287,"accn":"0000914317-14-000330","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-17"},{"end":"2013-12-31","val":0.0287,"accn":"0001213900-15-002235","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-31","frame":"CY2013Q4I"},{"end":"2014-12-31","val":0.0091,"accn":"0001213900-15-002235","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-31","frame":"CY2014Q4I"}]}},"FederalHomeLoanBankAdvancesGeneralDebtObligationsDisclosuresAmountOfAvailableUnusedFunds":{"label":"Federal Home Loan Bank, Advances, General Debt Obligations, Amount of Available, Unused Funds","description":"Amount of advances or credit lines available from the Federal Home Loan Bank (FHLB).","units":{"USD":[{"end":"2012-12-31","val":38797000,"accn":"0000914317-13-000322","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-15","frame":"CY2012Q4I"},{"end":"2013-12-31","val":54944000,"accn":"0000914317-14-000330","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-17","frame":"CY2013Q4I"},{"end":"2014-12-31","val":81282000,"accn":"0001213900-15-002235","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-31","frame":"CY2014Q4I"}]}},"FederalHomeLoanBankAdvancesGeneralDebtObligationsDisclosuresCollateralPledged1":{"label":"Federal Home Loan Bank, Advances, General Debt Obligations, Disclosures, Collateral Pledged","description":"Amount of the collateral pledged in support of federal home loan bank advances outstanding.","units":{"USD":[{"end":"2012-12-31","val":153154000,"accn":"0000914317-13-000322","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-15","frame":"CY2012Q4I"},{"end":"2013-12-31","val":167882000,"accn":"0000914317-14-000330","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-17","frame":"CY2013Q4I"},{"end":"2014-12-31","val":175707000,"accn":"0001213900-15-002235","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-31","frame":"CY2014Q4I"}]}},"FederalHomeLoanBankAdvancesGeneralDebtObligationsDisclosuresMaximumAmountAvailable":{"label":"Federal Home Loan Bank, Advances, General Debt Obligations, Maximum Amount Available","description":"Amount of maximum advances or credit lines available from the Federal Home Loan Bank (FHLB).","units":{"USD":[{"end":"2012-12-31","val":90867000,"accn":"0000914317-13-000322","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-15","frame":"CY2012Q4I"},{"end":"2013-12-31","val":100862000,"accn":"0000914317-14-000330","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-17","frame":"CY2013Q4I"},{"end":"2014-12-31","val":101553000,"accn":"0001213900-15-002235","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-31","frame":"CY2014Q4I"}]}},"FederalHomeLoanBankAdvancesLongTerm":{"label":"Long-term Federal Home Loan Bank Advances","description":"Including both current and noncurrent portions, Federal Home Loan Bank borrowings initially due beyond one year or beyond the normal operating cycle if longer.","units":{"USD":[{"end":"2011-12-31","val":50124000,"accn":"0000914317-12-000696","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-15"},{"end":"2011-12-31","val":50124000,"accn":"0000914317-12-001229","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-14"},{"end":"2011-12-31","val":50124000,"accn":"0000914317-12-001512","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-14"},{"end":"2011-12-31","val":50124000,"accn":"0000914317-13-000322","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-15","frame":"CY2011Q4I"},{"end":"2012-03-31","val":50124000,"accn":"0000914317-12-000696","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-15","frame":"CY2012Q1I"},{"end":"2012-06-30","val":55124000,"accn":"0000914317-12-001229","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-14","frame":"CY2012Q2I"},{"end":"2012-09-30","val":50124000,"accn":"0000914317-12-001512","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-14","frame":"CY2012Q3I"},{"end":"2012-12-31","val":50124000,"accn":"0000914317-13-000322","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-15"},{"end":"2012-12-31","val":50124000,"accn":"0000914317-13-000666","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-15"},{"end":"2012-12-31","val":50124000,"accn":"0000914317-13-001077","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-14"},{"end":"2012-12-31","val":50124000,"accn":"0000914317-13-001446","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-11-14"},{"end":"2012-12-31","val":50124000,"accn":"0000914317-14-000330","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-17","frame":"CY2012Q4I"},{"end":"2013-03-31","val":58124000,"accn":"0000914317-13-000666","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-15","frame":"CY2013Q1I"},{"end":"2013-06-30","val":66124000,"accn":"0000914317-13-001077","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-14","frame":"CY2013Q2I"},{"end":"2013-09-30","val":58124000,"accn":"0000914317-13-001446","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-11-14","frame":"CY2013Q3I"},{"end":"2013-12-31","val":38049000,"accn":"0000914317-14-000330","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-17"},{"end":"2013-12-31","val":38049000,"accn":"0000914317-14-000640","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-15"},{"end":"2013-12-31","val":38049000,"accn":"0000914317-14-001115","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-14"},{"end":"2013-12-31","val":38049000,"accn":"0001213900-14-008109","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-14"},{"end":"2013-12-31","val":38049000,"accn":"0001213900-15-002235","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-31","frame":"CY2013Q4I"},{"end":"2014-03-31","val":30119000,"accn":"0000914317-14-000640","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-15","frame":"CY2014Q1I"},{"end":"2014-06-30","val":27879000,"accn":"0000914317-14-001115","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-14","frame":"CY2014Q2I"},{"end":"2014-09-30","val":31372000,"accn":"0001213900-14-008109","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-14","frame":"CY2014Q3I"},{"end":"2014-12-31","val":20271000,"accn":"0001213900-15-002235","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-31","frame":"CY2014Q4I"}]}},"FederalHomeLoanBankStock":{"label":"Federal 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It does not have a readily determinable fair value because its ownership is restricted and it lacks a market 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This element refers to the gain (loss) included in earnings and not to the cash proceeds of the sale. This element is a noncash adjustment to net income when calculating net cash generated by operating activities using the indirect method.","units":{"USD":[{"start":"2010-01-01","end":"2010-06-30","val":28000,"accn":"0000914317-11-001265","fy":2011,"fp":"Q2","form":"10-Q/A","filed":"2011-09-14"},{"start":"2011-01-01","end":"2011-06-30","val":433000,"accn":"0000914317-11-001265","fy":2011,"fp":"Q2","form":"10-Q/A","filed":"2011-09-14"}]}},"GainLossOnSaleOfPropertyPlantEquipment":{"label":"Gain (Loss) on Disposition of Property Plant Equipment","description":"Amount of gain (loss) on sale or disposal of property, plant and equipment assets, including oil and gas property and timber 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GainsLossesOnSalesOfOtherRealEstate":{"label":"Gains 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ale":{"label":"Payments 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Such concept is used in determining the weighted average number of shares outstanding for purposes of calculating earnings per share 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