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Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).","units":{"USD":[{"end":"2012-12-31","val":24000000,"accn":"0000700733-13-000014","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-01","frame":"CY2012Q4I"},{"end":"2013-12-31","val":644000,"accn":"0000700733-14-000014","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03","frame":"CY2013Q4I"},{"end":"2014-12-31","val":65702000,"accn":"0000700733-15-000013","fy":2014,"fp":"FY","form":"10-K","filed":"2015-02-27","frame":"CY2014Q4I"},{"end":"2015-12-31","val":5858000,"accn":"0000700733-16-000048","fy":2015,"fp":"FY","form":"10-K","filed":"2016-02-29","frame":"CY2015Q4I"}]}},"FederalHomeLoanBankAdvancesMaturitiesSummaryDueWithinOneYearOfBalanceSheetDate":{"label":"Federal Home Loan Bank, Advance, Maturity, Year One","description":"Amount of advance from Federal Home Loan Bank (FHLBank) maturing in next fiscal year following current fiscal year. 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This element is a noncash adjustment to net income when calculating net cash generated by operating activities using the indirect 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This element refers to the gain (loss) included in earnings and not to the cash proceeds of the sale. 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15-08-07","frame":"CY2015Q2I"},{"end":"2015-09-30","val":77321000,"accn":"0000700733-15-000040","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-04","frame":"CY2015Q3I"},{"end":"2015-12-31","val":77321000,"accn":"0000700733-16-000048","fy":2015,"fp":"FY","form":"10-K","filed":"2016-02-29","frame":"CY2015Q4I"}]}},"SubordinatedLongTermDebt":{"label":"Subordinated 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