2.4.0.8004120 - Disclosure - Loans and Allowance for Loan Losses (Details 2)truefalseIn Thousands, unless otherwise specifiedfalse1false USDfalsefalse$FROM_Jan01_2013_TO_Jun30_2013_bncn_CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAxis_AccretableYieldMemberhttp://www.sec.gov/CIK0001210227duration2013-01-01T00:00:002013-06-30T00:00:00USDollarStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$2false USDfalsefalse$FROM_Jan01_2012_TO_Dec31_2012_bncn_CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAxis_AccretableYieldMemberhttp://www.sec.gov/CIK0001210227duration2012-01-01T00:00:002012-12-31T00:00:00USDollarStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$1false 0truefalsetruefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalse1false USDtruefalse$FROM_Jan01_2013_TO_Jun30_2013_bncn_CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAxis_AccretableYieldMemberhttp://www.sec.gov/CIK0001210227duration2013-01-01T00:00:002013-06-30T00:00:00falsefalseAccretable Yield [Member]bncn_CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAxisxbrldihttp://xbrl.org/2006/xbrldibncn_AccretableYieldMemberbncn_CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAxisexplicitMemberUSDollarStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$nanafalse0Accretable Yield [Member]2true 3us-gaap_CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAcquiredDuringPeriodLineItemsus-gaap_truenadurationfalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalsexbrli:stringItemTypestringfalse0Financing Receivable Covered [LineItems]3false 4us-gaap_CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAccretableYieldus-gaap_truedebitinstantfalsefalsefalsefalsefalsetruefalsefalseperiodStartLabel1truefalsefalse-12895000-12895USD$falsetruefalse2truefalsefalse-8387000-8387USD$falsetruefalsexbrli:monetaryItemTypemonetaryThe aggregate excess of a loan's cash flows expected to be collected over the investor's initial investment in the loan. 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