2.4.0.8004044 - Disclosure - Acquisitions (Details 6)truefalseIn Thousands, unless otherwise specifiedfalse1false USDfalsefalse$AS_OF_Jun30_2013http://www.sec.gov/CIK0001210227instant2013-06-30T00:00:000001-01-01T00:00:00USDollarStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$2false USDfalsefalse$AS_OF_Jun30_2012http://www.sec.gov/CIK0001210227instant2012-06-30T00:00:000001-01-01T00:00:00USDollarStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$3false USDtruefalse$AS_OF_Jun08_2012_bncn_CarolinaFederalAcquisitionAxis_AsRecordedByCarolinaFederalMemberhttp://www.sec.gov/CIK0001210227instant2012-06-08T00:00:000001-01-01T00:00:00falsefalseAs Recorded By Carolina Federal [Member]bncn_CarolinaFederalAcquisitionAxisxbrldihttp://xbrl.org/2006/xbrldibncn_AsRecordedByCarolinaFederalMemberbncn_CarolinaFederalAcquisitionAxisexplicitMemberUSDollarStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$4false USDtruefalse$AS_OF_Jun08_2012_bncn_CarolinaFederalAcquisitionAxis_CarolinaFederalFairValueAdjustmentsMemberhttp://www.sec.gov/CIK0001210227instant2012-06-08T00:00:000001-01-01T00:00:00falsefalseCarolina Federal Fair Value Adjustments [Member]bncn_CarolinaFederalAcquisitionAxisxbrldihttp://xbrl.org/2006/xbrldibncn_CarolinaFederalFairValueAdjustmentsMemberbncn_CarolinaFederalAcquisitionAxisexplicitMemberUSDollarStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$5false USDtruefalse$AS_OF_Jun08_2012_bncn_CarolinaFederalAcquisitionAxis_AsRecordedByBncCarolinaFederalAcquisitionMemberhttp://www.sec.gov/CIK0001210227instant2012-06-08T00:00:000001-01-01T00:00:00falsefalseAs Recorded By BNC Carolina Federal Acquisition [Member]bncn_CarolinaFederalAcquisitionAxisxbrldihttp://xbrl.org/2006/xbrldibncn_AsRecordedByBncCarolinaFederalAcquisitionMemberbncn_CarolinaFederalAcquisitionAxisexplicitMemberUSDollarStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$1true 3us-gaap_BusinessAcquisitionLineItemsus-gaap_truenadurationfalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalse3falsefalsefalse00falsefalsefalse4falsefalsefalse00falsefalsefalse5falsefalsefalse00falsefalsefalsexbrli:stringItemTypestringfalse0Business Acquisition [Line Items]2false 4us-gaap_BusinessAcquisitionPurchasePriceAllocationCurrentAssetsCashAndCashEquivalentsus-gaap_truedebitinstantfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalse3truefalsefalse83940008394USD$falsetruefalse4truefalsefalse00USD$falsetruefalse5truefalsefalse83940008394USD$falsetruefalsexbrli:monetaryItemTypemonetaryThe amount of cash and cash equivalents acquired in a business combination.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 141 -Paragraph 51 -Subparagraph e -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. 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This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. true2Assets Acquired9false 4bncn_BusinessAcquisitionPurchasePriceAllocationDepositLiabilitiesbncn_falsecreditinstantfalsefalsefalsefalsefalsefalsefalsetruenegatedLabel1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalse3truefalsefalse-52992000-52992falsefalsefalse4truefalsefalse-148000-148falsefalsefalse5truefalsefalse-53140000-53140falsefalsefalsexbrli:monetaryItemTypemonetaryNo authoritative reference available.No definition available.false2Deposits10false 4us-gaap_BusinessAcquisitionPurchasePriceAllocationDeferredTaxLiabilitiesNoncurrentus-gaap_truecreditinstantfalsefalsefalsefalsefalsefalsefalsetruenegatedLabel1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalse3truefalsefalse00falsefalsefalse4truefalsefalse-2981000-2981falsefalsefalse5truefalsefalse-2981000-2981falsefalsefalsexbrli:monetaryItemTypemonetaryGross amount of acquisition cost of a business combination allocated to noncurrent deferred tax liabilities.No definition available.false2Deferred Tax Liability11false 4us-gaap_BusinessAcquisitionPurchasePriceAllocationOtherLiabilitiesus-gaap_truecreditinstantfalsefalsefalsefalsefalsefalsefalsetruenegatedLabel1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalse3truefalsefalse-42000-42falsefalsefalse4truefalsefalse00falsefalsefalse5truefalsefalse-42000-42falsefalsefalsexbrli:monetaryItemTypemonetaryAmount of acquisition cost of a business combination allocated to other liabilities not separately disclosed in the balance sheet.No definition available.false2Other Liabilities12false 4us-gaap_BusinessAcquisitionPurchasePriceAllocationLiabilitiesAssumedus-gaap_truecreditinstantfalsefalsefalsefalsefalsefalsefalsetruenegatedTotalLabel1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalse3truefalsefalse-53034000-53034falsefalsefalse4truefalsefalse-3129000-3129falsefalsefalse5truefalsefalse-56163000-56163falsefalsefalsexbrli:monetaryItemTypemonetaryThe amount of acquisition cost of a business combination allocated to liabilities assumed.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Emerging Issues Task Force (EITF) -Number 98-1 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. 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