2.4.0.8004170 - Disclosure - Loans and Allowance for Loan Losses (Details 8)truefalseIn Thousands, unless otherwise specifiedfalse1false USDfalsefalse$AS_OF_Jun30_2013_bncn_CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAxis_AcquiredNonCoveredMember_us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis_CommercialRealEstateMemberhttp://www.sec.gov/CIK0001210227instant2013-06-30T00:00:000001-01-01T00:00:00USDollarStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$2false USDfalsefalse$AS_OF_Dec31_2012_bncn_CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAxis_AcquiredNonCoveredMember_us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis_CommercialRealEstateMemberhttp://www.sec.gov/CIK0001210227instant2012-12-31T00:00:000001-01-01T00:00:00USDollarStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$1false 0truefalsetruefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalse1false USDtruefalse$AS_OF_Jun30_2013_bncn_CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAxis_AcquiredNonCoveredMember_us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis_CommercialRealEstateMemberhttp://www.sec.gov/CIK0001210227instant2013-06-30T00:00:000001-01-01T00:00:00falsefalseCommercial Real Estate [Member]us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_CommercialRealEstateMemberus-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxisexplicitMemberfalsefalseAcquired Non-Covered [Member]bncn_CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAxisxbrldihttp://xbrl.org/2006/xbrldibncn_AcquiredNonCoveredMemberbncn_CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAxisexplicitMemberUSDollarStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$nanafalse0Commercial Real Estate [Member] | Acquired Non-Covered [Member]2true 3us-gaap_FinancingReceivableImpairedLineItemsus-gaap_truenadurationfalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalsexbrli:stringItemTypestringfalse0Financing Receivable, Impaired [Line Items]3false 4us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceRecordedInvestmentus-gaap_truedebitinstantfalsefalsefalsefalsefalsefalsefalsefalse1truefalsefalse00USD$falsetruefalse2truefalsefalse500000500USD$falsetruefalsexbrli:monetaryItemTypemonetaryAmount of investment in impaired financing receivables for which there is a related allowance for credit losses.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 14A -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=7512638&loc=SL6953550-111524 false2Impaired Financing Receivable, with Related Allowance, Recorded Investment4false 4us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceUnpaidPrincipalBalanceus-gaap_truedebitinstantfalsefalsefalsefalsefalsefalsefalsefalse1truefalsefalse00USD$falsefalsefalse2truefalsefalse800000800USD$falsefalsefalsexbrli:monetaryItemTypemonetaryUnpaid principal balance of impaired financing receivables for which there is a related allowance for credit losses.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 15 -Subparagraph (a)(4) -URI http://asc.fasb.org/extlink&oid=7512638&loc=d3e5212-111524 false2Impaired Financing Receivable, with Related Allowance, Unpaid Principal Balance5false 4us-gaap_ImpairedFinancingReceivableRelatedAllowanceus-gaap_truecreditinstantfalsefalsefalsefalsefalsefalsefalsefalse1truefalsefalse00USD$falsefalsefalse2truefalsefalse1600016USD$falsefalsefalsexbrli:monetaryItemTypemonetaryAmount of allowance for credit losses related to recorded investment.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 15 -Subparagraph (a)(3) -URI http://asc.fasb.org/extlink&oid=7512638&loc=d3e5212-111524 false2Impaired Financing Receivable, Related Allowance6false 4us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceRecordedInvestmentus-gaap_truedebitinstantfalsefalsefalsefalsefalsefalsefalsefalse1truefalsefalse173000173USD$falsefalsefalse2truefalsefalse248000248USD$falsefalsefalsexbrli:monetaryItemTypemonetaryAmount of investment in impaired financing receivables for which there is no related allowance for credit losses.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 14A -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=7512638&loc=SL6953550-111524 false2Impaired Financing Receivable, with No Related Allowance, Recorded Investment7false 4us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceUnpaidPrincipalBalanceus-gaap_truedebitinstantfalsefalsefalsefalsefalsefalsefalsefalse1truefalsefalse180000180USD$falsefalsefalse2truefalsefalse256000256USD$falsefalsefalsexbrli:monetaryItemTypemonetaryAmount of unpaid principal balance of impaired financing receivables for which there is no related allowance for credit losses.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 15 -Subparagraph (a)(4) -URI http://asc.fasb.org/extlink&oid=7512638&loc=d3e5212-111524 false2Impaired Financing Receivable, with No Related Allowance, Unpaid Principal Balance8false 0truefalsetruefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalse3false USDtruefalse$AS_OF_Jun30_2013_bncn_CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAxis_CoveredMember_us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis_CommercialRealEstateMemberhttp://www.sec.gov/CIK0001210227instant2013-06-30T00:00:000001-01-01T00:00:00falsefalseCommercial Real Estate [Member]us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_CommercialRealEstateMemberus-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxisexplicitMemberfalsefalseCovered [Member]bncn_CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAxisxbrldihttp://xbrl.org/2006/xbrldibncn_CoveredMemberbncn_CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAxisexplicitMemberUSDollarStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$nanafalse0Commercial Real Estate [Member] | Covered [Member]9true 3us-gaap_FinancingReceivableImpairedLineItemsus-gaap_truenadurationfalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalsexbrli:stringItemTypestringfalse0Financing Receivable, Impaired [Line Items]10false 4us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceRecordedInvestmentus-gaap_truedebitinstantfalsefalsefalsefalsefalsefalsefalsefalse1truefalsefalse00USD$falsefalsefalse2truefalsefalse00USD$falsefalsefalsexbrli:monetaryItemTypemonetaryAmount of investment in impaired financing receivables for which there is a related allowance for credit losses.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 14A -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=7512638&loc=SL6953550-111524 false2Impaired Financing Receivable, with Related Allowance, Recorded Investment11false 4us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceUnpaidPrincipalBalanceus-gaap_truedebitinstantfalsefalsefalsefalsefalsefalsefalsefalse1truefalsefalse00USD$falsefalsefalse2truefalsefalse00USD$falsefalsefalsexbrli:monetaryItemTypemonetaryUnpaid principal balance of impaired financing receivables for which there is a related allowance for credit losses.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 15 -Subparagraph (a)(4) -URI http://asc.fasb.org/extlink&oid=7512638&loc=d3e5212-111524 false2Impaired Financing Receivable, with Related Allowance, Unpaid Principal Balance12false 4us-gaap_ImpairedFinancingReceivableRelatedAllowanceus-gaap_truecreditinstantfalsefalsefalsefalsefalsefalsefalsefalse1truefalsefalse00USD$falsefalsefalse2truefalsefalse00USD$falsefalsefalsexbrli:monetaryItemTypemonetaryAmount of allowance for credit losses related to recorded investment.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 15 -Subparagraph (a)(3) -URI http://asc.fasb.org/extlink&oid=7512638&loc=d3e5212-111524 false2Impaired Financing Receivable, Related Allowance13false 4us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceRecordedInvestmentus-gaap_truedebitinstantfalsefalsefalsefalsefalsefalsefalsefalse1truefalsefalse745000745USD$falsefalsefalse2truefalsefalse548000548USD$falsefalsefalsexbrli:monetaryItemTypemonetaryAmount of investment in impaired financing receivables for which there is no related allowance for credit losses.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 14A -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=7512638&loc=SL6953550-111524 false2Impaired Financing Receivable, with No Related Allowance, Recorded Investment14false 4us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceUnpaidPrincipalBalanceus-gaap_truedebitinstantfalsefalsefalsefalsefalsefalsefalsefalse1truefalsefalse779000779USD$falsefalsefalse2truefalsefalse625000625USD$falsefalsefalsexbrli:monetaryItemTypemonetaryAmount of unpaid principal balance of impaired financing receivables for which there is no related allowance for credit losses.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 15 -Subparagraph (a)(4) -URI http://asc.fasb.org/extlink&oid=7512638&loc=d3e5212-111524 false2Impaired Financing Receivable, with No Related Allowance, Unpaid Principal Balance15false 0truefalsetruefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalse5false USDtruefalse$AS_OF_Jun30_2013_bncn_CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAxis_OriginatedMember_us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis_CommercialRealEstateMemberhttp://www.sec.gov/CIK0001210227instant2013-06-30T00:00:000001-01-01T00:00:00falsefalseCommercial Real Estate [Member]us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_CommercialRealEstateMemberus-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxisexplicitMemberfalsefalseOriginated [Member]bncn_CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAxisxbrldihttp://xbrl.org/2006/xbrldibncn_OriginatedMemberbncn_CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAxisexplicitMemberUSDollarStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$nanafalse0Commercial Real Estate [Member] | Originated [Member]16true 3us-gaap_FinancingReceivableImpairedLineItemsus-gaap_truenadurationfalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalsexbrli:stringItemTypestringfalse0Financing Receivable, Impaired [Line Items]17false 4us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceRecordedInvestmentus-gaap_truedebitinstantfalsefalsefalsefalsefalsefalsefalsefalse1truefalsefalse2765200027652USD$falsefalsefalse2truefalsefalse79180007918USD$falsefalsefalsexbrli:monetaryItemTypemonetaryAmount of investment in impaired financing receivables for which there is a related allowance for credit losses.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 14A -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=7512638&loc=SL6953550-111524 false2Impaired Financing Receivable, with Related Allowance, Recorded Investment18false 4us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceUnpaidPrincipalBalanceus-gaap_truedebitinstantfalsefalsefalsefalsefalsefalsefalsefalse1truefalsefalse2758500027585USD$falsefalsefalse2truefalsefalse78910007891USD$falsefalsefalsexbrli:monetaryItemTypemonetaryUnpaid principal balance of impaired financing receivables for which there is a related allowance for credit losses.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 15 -Subparagraph (a)(4) -URI http://asc.fasb.org/extlink&oid=7512638&loc=d3e5212-111524 false2Impaired Financing Receivable, with Related Allowance, Unpaid Principal Balance19false 4us-gaap_ImpairedFinancingReceivableRelatedAllowanceus-gaap_truecreditinstantfalsefalsefalsefalsefalsefalsefalsefalse1truefalsefalse29260002926USD$falsefalsefalse2truefalsefalse562000562USD$falsefalsefalsexbrli:monetaryItemTypemonetaryAmount of allowance for credit losses related to recorded investment.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 15 -Subparagraph (a)(3) -URI http://asc.fasb.org/extlink&oid=7512638&loc=d3e5212-111524 false2Impaired Financing Receivable, Related Allowance20false 4us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceRecordedInvestmentus-gaap_truedebitinstantfalsefalsefalsefalsefalsefalsefalsefalse1truefalsefalse65220006522USD$falsefalsefalse2truefalsefalse1791500017915USD$falsefalsefalsexbrli:monetaryItemTypemonetaryAmount of investment in impaired financing receivables for which there is no related allowance for credit losses.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 14A -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=7512638&loc=SL6953550-111524 false2Impaired Financing Receivable, with No Related Allowance, Recorded Investment21false 4us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceUnpaidPrincipalBalanceus-gaap_truedebitinstantfalsefalsefalsefalsefalsefalsefalsefalse1truefalsefalse65070006507USD$falsefalsefalse2truefalsefalse1786700017867USD$falsefalsefalsexbrli:monetaryItemTypemonetaryAmount of unpaid principal balance of impaired financing receivables for which there is no related allowance for credit losses.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 15 -Subparagraph (a)(4) -URI http://asc.fasb.org/extlink&oid=7512638&loc=d3e5212-111524 false2Impaired Financing Receivable, with No Related Allowance, Unpaid Principal Balance22false 0truefalsetruefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalse7false USDtruefalse$AS_OF_Jun30_2013_bncn_CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAxis_AcquiredNonCoveredMember_us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis_CommercialRealEstateConstructionFinancingReceivableMemberhttp://www.sec.gov/CIK0001210227instant2013-06-30T00:00:000001-01-01T00:00:00falsefalseCommercial Construction [Member]us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_CommercialRealEstateConstructionFinancingReceivableMemberus-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxisexplicitMemberfalsefalseAcquired Non-Covered [Member]bncn_CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAxisxbrldihttp://xbrl.org/2006/xbrldibncn_AcquiredNonCoveredMemberbncn_CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAxisexplicitMemberUSDollarStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$nanafalse0Commercial Construction [Member] | Acquired Non-Covered [Member]23true 3us-gaap_FinancingReceivableImpairedLineItemsus-gaap_truenadurationfalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalsexbrli:stringItemTypestringfalse0Financing Receivable, Impaired [Line Items]24false 4us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceRecordedInvestmentus-gaap_truedebitinstantfalsefalsefalsefalsefalsefalsefalsefalse1truefalsefalse00USD$falsefalsefalse2falsefalsefalse00falsefalsefalsexbrli:monetaryItemTypemonetaryAmount of investment in impaired financing receivables for which there is a related allowance for credit losses.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 14A -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=7512638&loc=SL6953550-111524 false2Impaired Financing Receivable, with Related Allowance, Recorded Investment25false 4us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceUnpaidPrincipalBalanceus-gaap_truedebitinstantfalsefalsefalsefalsefalsefalsefalsefalse1truefalsefalse00USD$falsefalsefalse2falsefalsefalse00falsefalsefalsexbrli:monetaryItemTypemonetaryUnpaid principal balance of impaired financing receivables for which there is a related allowance for credit losses.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 15 -Subparagraph (a)(4) -URI http://asc.fasb.org/extlink&oid=7512638&loc=d3e5212-111524 false2Impaired Financing Receivable, with Related Allowance, Unpaid Principal Balance26false 4us-gaap_ImpairedFinancingReceivableRelatedAllowanceus-gaap_truecreditinstantfalsefalsefalsefalsefalsefalsefalsefalse1truefalsefalse00USD$falsefalsefalse2falsefalsefalse00falsefalsefalsexbrli:monetaryItemTypemonetaryAmount of allowance for credit losses related to recorded investment.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 15 -Subparagraph (a)(3) -URI http://asc.fasb.org/extlink&oid=7512638&loc=d3e5212-111524 false2Impaired Financing Receivable, Related Allowance27false 4us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceRecordedInvestmentus-gaap_truedebitinstantfalsefalsefalsefalsefalsefalsefalsefalse1truefalsefalse245000245USD$falsefalsefalse2falsefalsefalse00falsefalsefalsexbrli:monetaryItemTypemonetaryAmount of investment in impaired financing receivables for which there is no related allowance for credit losses.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 14A -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=7512638&loc=SL6953550-111524 false2Impaired Financing Receivable, with No Related Allowance, Recorded Investment28false 4us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceUnpaidPrincipalBalanceus-gaap_truedebitinstantfalsefalsefalsefalsefalsefalsefalsefalse1truefalsefalse245000245USD$falsefalsefalse2falsefalsefalse00falsefalsefalsexbrli:monetaryItemTypemonetaryAmount of unpaid principal balance of impaired financing receivables for which there is no related allowance for credit losses.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 15 -Subparagraph (a)(4) -URI http://asc.fasb.org/extlink&oid=7512638&loc=d3e5212-111524 false2Impaired Financing Receivable, with No Related Allowance, Unpaid Principal Balance29false 0truefalsetruefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalse8false USDtruefalse$AS_OF_Jun30_2013_bncn_CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAxis_CoveredMember_us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis_CommercialRealEstateConstructionFinancingReceivableMemberhttp://www.sec.gov/CIK0001210227instant2013-06-30T00:00:000001-01-01T00:00:00falsefalseCommercial Construction [Member]us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_CommercialRealEstateConstructionFinancingReceivableMemberus-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxisexplicitMemberfalsefalseCovered [Member]bncn_CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAxisxbrldihttp://xbrl.org/2006/xbrldibncn_CoveredMemberbncn_CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAxisexplicitMemberUSDollarStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$nanafalse0Commercial Construction [Member] | Covered [Member]30true 3us-gaap_FinancingReceivableImpairedLineItemsus-gaap_truenadurationfalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalsexbrli:stringItemTypestringfalse0Financing Receivable, Impaired [Line Items]31false 4us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceRecordedInvestmentus-gaap_truedebitinstantfalsefalsefalsefalsefalsefalsefalsefalse1truefalsefalse00USD$falsefalsefalse2truefalsefalse00USD$falsefalsefalsexbrli:monetaryItemTypemonetaryAmount of investment in impaired financing receivables for which there is a related allowance for credit losses.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 14A -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=7512638&loc=SL6953550-111524 false2Impaired Financing Receivable, with Related Allowance, Recorded Investment32false 4us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceUnpaidPrincipalBalanceus-gaap_truedebitinstantfalsefalsefalsefalsefalsefalsefalsefalse1truefalsefalse00USD$falsefalsefalse2truefalsefalse00USD$falsefalsefalsexbrli:monetaryItemTypemonetaryUnpaid principal balance of impaired financing receivables for which there is a related allowance for credit losses.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 15 -Subparagraph (a)(4) -URI http://asc.fasb.org/extlink&oid=7512638&loc=d3e5212-111524 false2Impaired Financing Receivable, with Related Allowance, Unpaid Principal Balance33false 4us-gaap_ImpairedFinancingReceivableRelatedAllowanceus-gaap_truecreditinstantfalsefalsefalsefalsefalsefalsefalsefalse1truefalsefalse00USD$falsefalsefalse2truefalsefalse00USD$falsefalsefalsexbrli:monetaryItemTypemonetaryAmount of allowance for credit losses related to recorded investment.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 15 -Subparagraph (a)(3) -URI http://asc.fasb.org/extlink&oid=7512638&loc=d3e5212-111524 false2Impaired Financing Receivable, Related Allowance34false 4us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceRecordedInvestmentus-gaap_truedebitinstantfalsefalsefalsefalsefalsefalsefalsefalse1truefalsefalse313000313USD$falsefalsefalse2truefalsefalse530000530USD$falsefalsefalsexbrli:monetaryItemTypemonetaryAmount of investment in impaired financing receivables for which there is no related allowance for credit losses.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 14A -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=7512638&loc=SL6953550-111524 false2Impaired Financing Receivable, with No Related Allowance, Recorded Investment35false 4us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceUnpaidPrincipalBalanceus-gaap_truedebitinstantfalsefalsefalsefalsefalsefalsefalsefalse1truefalsefalse340000340USD$falsefalsefalse2truefalsefalse561000561USD$falsefalsefalsexbrli:monetaryItemTypemonetaryAmount of unpaid principal balance of impaired financing receivables for which there is no related allowance for credit losses.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 15 -Subparagraph (a)(4) -URI http://asc.fasb.org/extlink&oid=7512638&loc=d3e5212-111524 false2Impaired Financing Receivable, with No Related Allowance, Unpaid Principal Balance36false 0truefalsetruefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalse10false USDtruefalse$AS_OF_Jun30_2013_bncn_CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAxis_OriginatedMember_us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis_CommercialRealEstateConstructionFinancingReceivableMemberhttp://www.sec.gov/CIK0001210227instant2013-06-30T00:00:000001-01-01T00:00:00falsefalseCommercial Construction [Member]us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_CommercialRealEstateConstructionFinancingReceivableMemberus-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxisexplicitMemberfalsefalseOriginated [Member]bncn_CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAxisxbrldihttp://xbrl.org/2006/xbrldibncn_OriginatedMemberbncn_CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAxisexplicitMemberUSDollarStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$nanafalse0Commercial Construction [Member] | Originated [Member]37true 3us-gaap_FinancingReceivableImpairedLineItemsus-gaap_truenadurationfalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalsexbrli:stringItemTypestringfalse0Financing Receivable, Impaired [Line Items]38false 4us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceRecordedInvestmentus-gaap_truedebitinstantfalsefalsefalsefalsefalsefalsefalsefalse1truefalsefalse49820004982USD$falsefalsefalse2truefalsefalse1183800011838USD$falsefalsefalsexbrli:monetaryItemTypemonetaryAmount of investment in impaired financing receivables for which there is a related allowance for credit losses.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 14A -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=7512638&loc=SL6953550-111524 false2Impaired Financing Receivable, with Related Allowance, Recorded Investment39false 4us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceUnpaidPrincipalBalanceus-gaap_truedebitinstantfalsefalsefalsefalsefalsefalsefalsefalse1truefalsefalse50460005046USD$falsefalsefalse2truefalsefalse1181500011815USD$falsefalsefalsexbrli:monetaryItemTypemonetaryUnpaid principal balance of impaired financing receivables for which there is a related allowance for credit losses.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 15 -Subparagraph (a)(4) -URI http://asc.fasb.org/extlink&oid=7512638&loc=d3e5212-111524 false2Impaired Financing Receivable, with Related Allowance, Unpaid Principal Balance40false 4us-gaap_ImpairedFinancingReceivableRelatedAllowanceus-gaap_truecreditinstantfalsefalsefalsefalsefalsefalsefalsefalse1truefalsefalse738000738USD$falsefalsefalse2truefalsefalse30220003022USD$falsefalsefalsexbrli:monetaryItemTypemonetaryAmount of allowance for credit losses related to recorded investment.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 15 -Subparagraph (a)(3) -URI http://asc.fasb.org/extlink&oid=7512638&loc=d3e5212-111524 false2Impaired Financing Receivable, Related Allowance41false 4us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceRecordedInvestmentus-gaap_truedebitinstantfalsefalsefalsefalsefalsefalsefalsefalse1truefalsefalse79810007981USD$falsefalsefalse2truefalsefalse75810007581USD$falsefalsefalsexbrli:monetaryItemTypemonetaryAmount of investment in impaired financing receivables for which there is no related allowance for credit losses.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 14A -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=7512638&loc=SL6953550-111524 false2Impaired Financing Receivable, with No Related Allowance, Recorded Investment42false 4us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceUnpaidPrincipalBalanceus-gaap_truedebitinstantfalsefalsefalsefalsefalsefalsefalsefalse1truefalsefalse82870008287USD$falsefalsefalse2truefalsefalse75520007552USD$falsefalsefalsexbrli:monetaryItemTypemonetaryAmount of unpaid principal balance of impaired financing receivables for which there is no related allowance for credit losses.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 15 -Subparagraph (a)(4) -URI http://asc.fasb.org/extlink&oid=7512638&loc=d3e5212-111524 false2Impaired Financing Receivable, with No Related Allowance, Unpaid Principal Balance43false 0truefalsetruefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalse12false USDtruefalse$AS_OF_Jun30_2013_bncn_CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAxis_AcquiredNonCoveredMember_us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis_CommercialAndIndustrialMemberhttp://www.sec.gov/CIK0001210227instant2013-06-30T00:00:000001-01-01T00:00:00falsefalseCommercial and Industrial [Member]us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxisxbrldihttp://xbrl.org/2006/xbrldibncn_CommercialAndIndustrialMemberus-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxisexplicitMemberfalsefalseAcquired Non-Covered [Member]bncn_CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAxisxbrldihttp://xbrl.org/2006/xbrldibncn_AcquiredNonCoveredMemberbncn_CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAxisexplicitMemberUSDollarStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$nanafalse0Commercial and Industrial [Member] | Acquired Non-Covered [Member]44true 3us-gaap_FinancingReceivableImpairedLineItemsus-gaap_truenadurationfalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalsexbrli:stringItemTypestringfalse0Financing Receivable, Impaired [Line Items]45false 4us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceRecordedInvestmentus-gaap_truedebitinstantfalsefalsefalsefalsefalsefalsefalsefalse1truefalsefalse00USD$falsefalsefalse2truefalsefalse240000240USD$falsefalsefalsexbrli:monetaryItemTypemonetaryAmount of investment in impaired financing receivables for which there is a related allowance for credit losses.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 14A -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=7512638&loc=SL6953550-111524 false2Impaired Financing Receivable, with Related Allowance, Recorded Investment46false 4us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceUnpaidPrincipalBalanceus-gaap_truedebitinstantfalsefalsefalsefalsefalsefalsefalsefalse1truefalsefalse00USD$falsefalsefalse2truefalsefalse240000240USD$falsefalsefalsexbrli:monetaryItemTypemonetaryUnpaid principal balance of impaired financing receivables for which there is a related allowance for credit losses.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 15 -Subparagraph (a)(4) -URI http://asc.fasb.org/extlink&oid=7512638&loc=d3e5212-111524 false2Impaired Financing Receivable, with Related Allowance, Unpaid Principal Balance47false 4us-gaap_ImpairedFinancingReceivableRelatedAllowanceus-gaap_truecreditinstantfalsefalsefalsefalsefalsefalsefalsefalse1truefalsefalse00USD$falsefalsefalse2truefalsefalse30003USD$falsefalsefalsexbrli:monetaryItemTypemonetaryAmount of allowance for credit losses related to recorded investment.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 15 -Subparagraph (a)(3) -URI http://asc.fasb.org/extlink&oid=7512638&loc=d3e5212-111524 false2Impaired Financing Receivable, Related Allowance48false 4us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceRecordedInvestmentus-gaap_truedebitinstantfalsefalsefalsefalsefalsefalsefalsefalse1truefalsefalse298000298USD$falsefalsefalse2truefalsefalse00USD$falsefalsefalsexbrli:monetaryItemTypemonetaryAmount of investment in impaired financing receivables for which there is no related allowance for credit losses.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 14A -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=7512638&loc=SL6953550-111524 false2Impaired Financing Receivable, with No Related Allowance, Recorded Investment49false 4us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceUnpaidPrincipalBalanceus-gaap_truedebitinstantfalsefalsefalsefalsefalsefalsefalsefalse1truefalsefalse310000310USD$falsefalsefalse2truefalsefalse00USD$falsefalsefalsexbrli:monetaryItemTypemonetaryAmount of unpaid principal balance of impaired financing receivables for which there is no related allowance for credit losses.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 15 -Subparagraph (a)(4) -URI http://asc.fasb.org/extlink&oid=7512638&loc=d3e5212-111524 false2Impaired Financing Receivable, with No Related Allowance, Unpaid Principal Balance50false 0truefalsetruefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalse14false USDtruefalse$AS_OF_Jun30_2013_bncn_CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAxis_CoveredMember_us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis_CommercialAndIndustrialMemberhttp://www.sec.gov/CIK0001210227instant2013-06-30T00:00:000001-01-01T00:00:00falsefalseCommercial and Industrial [Member]us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxisxbrldihttp://xbrl.org/2006/xbrldibncn_CommercialAndIndustrialMemberus-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxisexplicitMemberfalsefalseCovered [Member]bncn_CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAxisxbrldihttp://xbrl.org/2006/xbrldibncn_CoveredMemberbncn_CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAxisexplicitMemberUSDollarStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$nanafalse0Commercial and Industrial [Member] | Covered [Member]51true 3us-gaap_FinancingReceivableImpairedLineItemsus-gaap_truenadurationfalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalsexbrli:stringItemTypestringfalse0Financing Receivable, Impaired [Line Items]52false 4us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceRecordedInvestmentus-gaap_truedebitinstantfalsefalsefalsefalsefalsefalsefalsefalse1truefalsefalse00USD$falsefalsefalse2truefalsefalse00USD$falsefalsefalsexbrli:monetaryItemTypemonetaryAmount of investment in impaired financing receivables for which there is a related allowance for credit losses.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 14A -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=7512638&loc=SL6953550-111524 false2Impaired Financing Receivable, with Related Allowance, Recorded Investment53false 4us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceUnpaidPrincipalBalanceus-gaap_truedebitinstantfalsefalsefalsefalsefalsefalsefalsefalse1truefalsefalse00USD$falsefalsefalse2truefalsefalse00USD$falsefalsefalsexbrli:monetaryItemTypemonetaryUnpaid principal balance of impaired financing receivables for which there is a related allowance for credit losses.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 15 -Subparagraph (a)(4) -URI http://asc.fasb.org/extlink&oid=7512638&loc=d3e5212-111524 false2Impaired Financing Receivable, with Related Allowance, Unpaid Principal Balance54false 4us-gaap_ImpairedFinancingReceivableRelatedAllowanceus-gaap_truecreditinstantfalsefalsefalsefalsefalsefalsefalsefalse1truefalsefalse00USD$falsefalsefalse2truefalsefalse00USD$falsefalsefalsexbrli:monetaryItemTypemonetaryAmount of allowance for credit losses related to recorded investment.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 15 -Subparagraph (a)(3) -URI http://asc.fasb.org/extlink&oid=7512638&loc=d3e5212-111524 false2Impaired Financing Receivable, Related Allowance55false 4us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceRecordedInvestmentus-gaap_truedebitinstantfalsefalsefalsefalsefalsefalsefalsefalse1truefalsefalse137000137USD$falsefalsefalse2truefalsefalse143000143USD$falsefalsefalsexbrli:monetaryItemTypemonetaryAmount of investment in impaired financing receivables for which there is no related allowance for credit losses.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 14A -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=7512638&loc=SL6953550-111524 false2Impaired Financing Receivable, with No Related Allowance, Recorded Investment56false 4us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceUnpaidPrincipalBalanceus-gaap_truedebitinstantfalsefalsefalsefalsefalsefalsefalsefalse1truefalsefalse170000170USD$falsefalsefalse2truefalsefalse176000176USD$falsefalsefalsexbrli:monetaryItemTypemonetaryAmount of unpaid principal balance of impaired financing receivables for which there is no related allowance for credit losses.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 15 -Subparagraph (a)(4) -URI http://asc.fasb.org/extlink&oid=7512638&loc=d3e5212-111524 false2Impaired Financing Receivable, with No Related Allowance, Unpaid Principal Balance57false 0truefalsetruefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalse16false USDtruefalse$AS_OF_Jun30_2013_bncn_CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAxis_OriginatedMember_us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis_CommercialAndIndustrialMemberhttp://www.sec.gov/CIK0001210227instant2013-06-30T00:00:000001-01-01T00:00:00falsefalseCommercial and Industrial [Member]us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxisxbrldihttp://xbrl.org/2006/xbrldibncn_CommercialAndIndustrialMemberus-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxisexplicitMemberfalsefalseOriginated [Member]bncn_CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAxisxbrldihttp://xbrl.org/2006/xbrldibncn_OriginatedMemberbncn_CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAxisexplicitMemberUSDollarStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$nanafalse0Commercial and Industrial [Member] | Originated [Member]58true 3us-gaap_FinancingReceivableImpairedLineItemsus-gaap_truenadurationfalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalsexbrli:stringItemTypestringfalse0Financing Receivable, Impaired [Line Items]59false 4us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceRecordedInvestmentus-gaap_truedebitinstantfalsefalsefalsefalsefalsefalsefalsefalse1truefalsefalse778000778USD$falsefalsefalse2truefalsefalse9900099USD$falsefalsefalsexbrli:monetaryItemTypemonetaryAmount of investment in impaired financing receivables for which there is a related allowance for credit losses.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 14A -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=7512638&loc=SL6953550-111524 false2Impaired Financing Receivable, with Related Allowance, Recorded Investment60false 4us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceUnpaidPrincipalBalanceus-gaap_truedebitinstantfalsefalsefalsefalsefalsefalsefalsefalse1truefalsefalse776000776USD$falsefalsefalse2truefalsefalse9900099USD$falsefalsefalsexbrli:monetaryItemTypemonetaryUnpaid principal balance of impaired financing receivables for which there is a related allowance for credit losses.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 15 -Subparagraph (a)(4) -URI http://asc.fasb.org/extlink&oid=7512638&loc=d3e5212-111524 false2Impaired Financing Receivable, with Related Allowance, Unpaid Principal Balance61false 4us-gaap_ImpairedFinancingReceivableRelatedAllowanceus-gaap_truecreditinstantfalsefalsefalsefalsefalsefalsefalsefalse1truefalsefalse2400024USD$falsefalsefalse2truefalsefalse10001USD$falsefalsefalsexbrli:monetaryItemTypemonetaryAmount of allowance for credit losses related to recorded investment.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 15 -Subparagraph (a)(3) -URI http://asc.fasb.org/extlink&oid=7512638&loc=d3e5212-111524 false2Impaired Financing Receivable, Related Allowance62false 4us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceRecordedInvestmentus-gaap_truedebitinstantfalsefalsefalsefalsefalsefalsefalsefalse1truefalsefalse00USD$falsefalsefalse2truefalsefalse13520001352USD$falsefalsefalsexbrli:monetaryItemTypemonetaryAmount of investment in impaired financing receivables for which there is no related allowance for credit losses.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 14A -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=7512638&loc=SL6953550-111524 false2Impaired Financing Receivable, with No Related Allowance, Recorded Investment63false 4us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceUnpaidPrincipalBalanceus-gaap_truedebitinstantfalsefalsefalsefalsefalsefalsefalsefalse1truefalsefalse00USD$falsefalsefalse2truefalsefalse13510001351USD$falsefalsefalsexbrli:monetaryItemTypemonetaryAmount of unpaid principal balance of impaired financing receivables for which there is no related allowance for credit losses.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 15 -Subparagraph (a)(4) -URI http://asc.fasb.org/extlink&oid=7512638&loc=d3e5212-111524 false2Impaired Financing Receivable, with No Related Allowance, Unpaid Principal Balance64false 0truefalsetruefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalse18false USDtruefalse$AS_OF_Jun30_2013_bncn_CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAxis_OriginatedMember_us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis_ResidentialRealEstateMemberhttp://www.sec.gov/CIK0001210227instant2013-06-30T00:00:000001-01-01T00:00:00falsefalseResidential Construction [Member]us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_ResidentialRealEstateMemberus-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxisexplicitMemberfalsefalseOriginated [Member]bncn_CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAxisxbrldihttp://xbrl.org/2006/xbrldibncn_OriginatedMemberbncn_CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAxisexplicitMemberUSDollarStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$nanafalse0Residential Construction [Member] | Originated [Member]65true 3us-gaap_FinancingReceivableImpairedLineItemsus-gaap_truenadurationfalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalsexbrli:stringItemTypestringfalse0Financing Receivable, Impaired [Line Items]66false 4us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceRecordedInvestmentus-gaap_truedebitinstantfalsefalsefalsefalsefalsefalsefalsefalse1truefalsefalse583000583USD$falsefalsefalse2truefalsefalse362000362USD$falsefalsefalsexbrli:monetaryItemTypemonetaryAmount of investment in impaired financing receivables for which there is a related allowance for credit losses.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 14A -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=7512638&loc=SL6953550-111524 false2Impaired Financing Receivable, with Related Allowance, Recorded Investment67false 4us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceUnpaidPrincipalBalanceus-gaap_truedebitinstantfalsefalsefalsefalsefalsefalsefalsefalse1truefalsefalse582000582USD$falsefalsefalse2truefalsefalse361000361USD$falsefalsefalsexbrli:monetaryItemTypemonetaryUnpaid principal balance of impaired financing receivables for which there is a related allowance for credit losses.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 15 -Subparagraph (a)(4) -URI http://asc.fasb.org/extlink&oid=7512638&loc=d3e5212-111524 false2Impaired Financing Receivable, with Related Allowance, Unpaid Principal Balance68false 4us-gaap_ImpairedFinancingReceivableRelatedAllowanceus-gaap_truecreditinstantfalsefalsefalsefalsefalsefalsefalsefalse1truefalsefalse5200052USD$falsefalsefalse2truefalsefalse20002USD$falsefalsefalsexbrli:monetaryItemTypemonetaryAmount of allowance for credit losses related to recorded investment.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 15 -Subparagraph (a)(3) -URI http://asc.fasb.org/extlink&oid=7512638&loc=d3e5212-111524 false2Impaired Financing Receivable, Related Allowance69false 4us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceRecordedInvestmentus-gaap_truedebitinstantfalsefalsefalsefalsefalsefalsefalsefalse1truefalsefalse00USD$falsefalsefalse2truefalsefalse00USD$falsefalsefalsexbrli:monetaryItemTypemonetaryAmount of investment in impaired financing receivables for which there is no related allowance for credit losses.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 14A -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=7512638&loc=SL6953550-111524 false2Impaired Financing Receivable, with No Related Allowance, Recorded Investment70false 4us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceUnpaidPrincipalBalanceus-gaap_truedebitinstantfalsefalsefalsefalsefalsefalsefalsefalse1truefalsefalse00USD$falsefalsefalse2truefalsefalse00USD$falsefalsefalsexbrli:monetaryItemTypemonetaryAmount of unpaid principal balance of impaired financing receivables for which there is no related allowance for credit losses.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 15 -Subparagraph (a)(4) -URI http://asc.fasb.org/extlink&oid=7512638&loc=d3e5212-111524 false2Impaired Financing Receivable, with No Related Allowance, Unpaid Principal Balance71false 0truefalsetruefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalse20false USDtruefalse$AS_OF_Jun30_2013_bncn_CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAxis_AcquiredNonCoveredMember_us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis_ResidentialMortgageMemberhttp://www.sec.gov/CIK0001210227instant2013-06-30T00:00:000001-01-01T00:00:00falsefalseResidential Mortgage [Member]us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_ResidentialMortgageMemberus-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxisexplicitMemberfalsefalseAcquired Non-Covered [Member]bncn_CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAxisxbrldihttp://xbrl.org/2006/xbrldibncn_AcquiredNonCoveredMemberbncn_CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAxisexplicitMemberUSDollarStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$nanafalse0Residential Mortgage [Member] | Acquired Non-Covered [Member]72true 3us-gaap_FinancingReceivableImpairedLineItemsus-gaap_truenadurationfalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalsexbrli:stringItemTypestringfalse0Financing Receivable, Impaired [Line Items]73false 4us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceRecordedInvestmentus-gaap_truedebitinstantfalsefalsefalsefalsefalsefalsefalsefalse1truefalsefalse00USD$falsefalsefalse2truefalsefalse601000601USD$falsefalsefalsexbrli:monetaryItemTypemonetaryAmount of investment in impaired financing receivables for which there is a related allowance for credit losses.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 14A -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=7512638&loc=SL6953550-111524 false2Impaired Financing Receivable, with Related Allowance, Recorded Investment74false 4us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceUnpaidPrincipalBalanceus-gaap_truedebitinstantfalsefalsefalsefalsefalsefalsefalsefalse1truefalsefalse00USD$falsefalsefalse2truefalsefalse607000607USD$falsefalsefalsexbrli:monetaryItemTypemonetaryUnpaid principal balance of impaired financing receivables for which there is a related allowance for credit losses.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 15 -Subparagraph (a)(4) -URI http://asc.fasb.org/extlink&oid=7512638&loc=d3e5212-111524 false2Impaired Financing Receivable, with Related Allowance, Unpaid Principal Balance75false 4us-gaap_ImpairedFinancingReceivableRelatedAllowanceus-gaap_truecreditinstantfalsefalsefalsefalsefalsefalsefalsefalse1truefalsefalse00USD$falsefalsefalse2truefalsefalse8700087USD$falsefalsefalsexbrli:monetaryItemTypemonetaryAmount of allowance for credit losses related to recorded investment.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 15 -Subparagraph (a)(3) -URI http://asc.fasb.org/extlink&oid=7512638&loc=d3e5212-111524 false2Impaired Financing Receivable, Related Allowance76false 4us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceRecordedInvestmentus-gaap_truedebitinstantfalsefalsefalsefalsefalsefalsefalsefalse1truefalsefalse16590001659USD$falsefalsefalse2truefalsefalse765000765USD$falsefalsefalsexbrli:monetaryItemTypemonetaryAmount of investment in impaired financing receivables for which there is no related allowance for credit losses.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 14A -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=7512638&loc=SL6953550-111524 false2Impaired Financing Receivable, with No Related Allowance, Recorded Investment77false 4us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceUnpaidPrincipalBalanceus-gaap_truedebitinstantfalsefalsefalsefalsefalsefalsefalsefalse1truefalsefalse18050001805USD$falsefalsefalse2truefalsefalse895000895USD$falsefalsefalsexbrli:monetaryItemTypemonetaryAmount of unpaid principal balance of impaired financing receivables for which there is no related allowance for credit losses.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 15 -Subparagraph (a)(4) -URI http://asc.fasb.org/extlink&oid=7512638&loc=d3e5212-111524 false2Impaired Financing Receivable, with No Related Allowance, Unpaid Principal Balance78false 0truefalsetruefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalse22false USDtruefalse$AS_OF_Jun30_2013_bncn_CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAxis_CoveredMember_us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis_ResidentialMortgageMemberhttp://www.sec.gov/CIK0001210227instant2013-06-30T00:00:000001-01-01T00:00:00falsefalseResidential Mortgage [Member]us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_ResidentialMortgageMemberus-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxisexplicitMemberfalsefalseCovered [Member]bncn_CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAxisxbrldihttp://xbrl.org/2006/xbrldibncn_CoveredMemberbncn_CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAxisexplicitMemberUSDollarStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$nanafalse0Residential Mortgage [Member] | Covered [Member]79true 3us-gaap_FinancingReceivableImpairedLineItemsus-gaap_truenadurationfalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalsexbrli:stringItemTypestringfalse0Financing Receivable, Impaired [Line Items]80false 4us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceRecordedInvestmentus-gaap_truedebitinstantfalsefalsefalsefalsefalsefalsefalsefalse1truefalsefalse00USD$falsefalsefalse2truefalsefalse00USD$falsefalsefalsexbrli:monetaryItemTypemonetaryAmount of investment in impaired financing receivables for which there is a related allowance for credit losses.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 14A -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=7512638&loc=SL6953550-111524 false2Impaired Financing Receivable, with Related Allowance, Recorded Investment81false 4us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceUnpaidPrincipalBalanceus-gaap_truedebitinstantfalsefalsefalsefalsefalsefalsefalsefalse1truefalsefalse00USD$falsefalsefalse2truefalsefalse00USD$falsefalsefalsexbrli:monetaryItemTypemonetaryUnpaid principal balance of impaired financing receivables for which there is a related allowance for credit losses.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 15 -Subparagraph (a)(4) -URI http://asc.fasb.org/extlink&oid=7512638&loc=d3e5212-111524 false2Impaired Financing Receivable, with Related Allowance, Unpaid Principal Balance82false 4us-gaap_ImpairedFinancingReceivableRelatedAllowanceus-gaap_truecreditinstantfalsefalsefalsefalsefalsefalsefalsefalse1truefalsefalse00USD$falsefalsefalse2truefalsefalse00USD$falsefalsefalsexbrli:monetaryItemTypemonetaryAmount of allowance for credit losses related to recorded investment.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 15 -Subparagraph (a)(3) -URI http://asc.fasb.org/extlink&oid=7512638&loc=d3e5212-111524 false2Impaired Financing Receivable, Related Allowance83false 4us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceRecordedInvestmentus-gaap_truedebitinstantfalsefalsefalsefalsefalsefalsefalsefalse1truefalsefalse66470006647USD$falsefalsefalse2truefalsefalse55040005504USD$falsefalsefalsexbrli:monetaryItemTypemonetaryAmount of investment in impaired financing receivables for which there is no related allowance for credit losses.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 14A -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=7512638&loc=SL6953550-111524 false2Impaired Financing Receivable, with No Related Allowance, Recorded Investment84false 4us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceUnpaidPrincipalBalanceus-gaap_truedebitinstantfalsefalsefalsefalsefalsefalsefalsefalse1truefalsefalse68850006885USD$falsefalsefalse2truefalsefalse57490005749USD$falsefalsefalsexbrli:monetaryItemTypemonetaryAmount of unpaid principal balance of impaired financing receivables for which there is no related allowance for credit losses.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 15 -Subparagraph (a)(4) -URI http://asc.fasb.org/extlink&oid=7512638&loc=d3e5212-111524 false2Impaired Financing Receivable, with No Related Allowance, Unpaid Principal Balance85false 0truefalsetruefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalse24false USDtruefalse$AS_OF_Jun30_2013_bncn_CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAxis_OriginatedMember_us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis_ResidentialMortgageMemberhttp://www.sec.gov/CIK0001210227instant2013-06-30T00:00:000001-01-01T00:00:00falsefalseResidential Mortgage [Member]us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_ResidentialMortgageMemberus-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxisexplicitMemberfalsefalseOriginated [Member]bncn_CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAxisxbrldihttp://xbrl.org/2006/xbrldibncn_OriginatedMemberbncn_CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAxisexplicitMemberUSDollarStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$nanafalse0Residential Mortgage [Member] | Originated [Member]86true 3us-gaap_FinancingReceivableImpairedLineItemsus-gaap_truenadurationfalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalsexbrli:stringItemTypestringfalse0Financing Receivable, Impaired [Line Items]87false 4us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceRecordedInvestmentus-gaap_truedebitinstantfalsefalsefalsefalsefalsefalsefalsefalse1truefalsefalse1452300014523USD$falsefalsefalse2truefalsefalse1077200010772USD$falsefalsefalsexbrli:monetaryItemTypemonetaryAmount of investment in impaired financing receivables for which there is a related allowance for credit losses.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 14A -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=7512638&loc=SL6953550-111524 false2Impaired Financing Receivable, with Related Allowance, Recorded Investment88false 4us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceUnpaidPrincipalBalanceus-gaap_truedebitinstantfalsefalsefalsefalsefalsefalsefalsefalse1truefalsefalse1448700014487USD$falsefalsefalse2truefalsefalse1075500010755USD$falsefalsefalsexbrli:monetaryItemTypemonetaryUnpaid principal balance of impaired financing receivables for which there is a related allowance for credit losses.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 15 -Subparagraph (a)(4) -URI http://asc.fasb.org/extlink&oid=7512638&loc=d3e5212-111524 false2Impaired Financing Receivable, with Related Allowance, Unpaid Principal Balance89false 4us-gaap_ImpairedFinancingReceivableRelatedAllowanceus-gaap_truecreditinstantfalsefalsefalsefalsefalsefalsefalsefalse1truefalsefalse17170001717USD$falsefalsefalse2truefalsefalse15260001526USD$falsefalsefalsexbrli:monetaryItemTypemonetaryAmount of allowance for credit losses related to recorded investment.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 15 -Subparagraph (a)(3) -URI http://asc.fasb.org/extlink&oid=7512638&loc=d3e5212-111524 false2Impaired Financing Receivable, Related Allowance90false 4us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceRecordedInvestmentus-gaap_truedebitinstantfalsefalsefalsefalsefalsefalsefalsefalse1truefalsefalse826000826USD$falsefalsefalse2truefalsefalse48010004801USD$falsefalsefalsexbrli:monetaryItemTypemonetaryAmount of investment in impaired financing receivables for which there is no related allowance for credit losses.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 14A -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=7512638&loc=SL6953550-111524 false2Impaired Financing Receivable, with No Related Allowance, Recorded Investment91false 4us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceUnpaidPrincipalBalanceus-gaap_truedebitinstantfalsefalsefalsefalsefalsefalsefalsefalse1truefalsefalse826000826USD$falsefalsefalse2truefalsefalse47880004788USD$falsefalsefalsexbrli:monetaryItemTypemonetaryAmount of unpaid principal balance of impaired financing receivables for which there is no related allowance for credit losses.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 15 -Subparagraph (a)(4) -URI http://asc.fasb.org/extlink&oid=7512638&loc=d3e5212-111524 false2Impaired Financing Receivable, with No Related Allowance, Unpaid Principal Balance92false 0truefalsetruefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalse26false USDtruefalse$AS_OF_Jun30_2013_bncn_CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAxis_AcquiredNonCoveredMember_us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis_ConsumerLoanMemberhttp://www.sec.gov/CIK0001210227instant2013-06-30T00:00:000001-01-01T00:00:00falsefalseConsumer and Other [Member]us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_ConsumerLoanMemberus-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxisexplicitMemberfalsefalseAcquired Non-Covered [Member]bncn_CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAxisxbrldihttp://xbrl.org/2006/xbrldibncn_AcquiredNonCoveredMemberbncn_CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAxisexplicitMemberUSDollarStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$nanafalse0Consumer and Other [Member] | Acquired Non-Covered [Member]93true 3us-gaap_FinancingReceivableImpairedLineItemsus-gaap_truenadurationfalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalsexbrli:stringItemTypestringfalse0Financing Receivable, Impaired [Line Items]94false 4us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceRecordedInvestmentus-gaap_truedebitinstantfalsefalsefalsefalsefalsefalsefalsefalse1truefalsefalse00USD$falsefalsefalse2truefalsefalse00USD$falsefalsefalsexbrli:monetaryItemTypemonetaryAmount of investment in impaired financing receivables for which there is a related allowance for credit losses.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 14A -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=7512638&loc=SL6953550-111524 false2Impaired Financing Receivable, with Related Allowance, Recorded Investment95false 4us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceUnpaidPrincipalBalanceus-gaap_truedebitinstantfalsefalsefalsefalsefalsefalsefalsefalse1truefalsefalse00USD$falsefalsefalse2truefalsefalse00USD$falsefalsefalsexbrli:monetaryItemTypemonetaryUnpaid principal balance of impaired financing receivables for which there is a related allowance for credit losses.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 15 -Subparagraph (a)(4) -URI http://asc.fasb.org/extlink&oid=7512638&loc=d3e5212-111524 false2Impaired Financing Receivable, with Related Allowance, Unpaid Principal Balance96false 4us-gaap_ImpairedFinancingReceivableRelatedAllowanceus-gaap_truecreditinstantfalsefalsefalsefalsefalsefalsefalsefalse1truefalsefalse00USD$falsefalsefalse2truefalsefalse00USD$falsefalsefalsexbrli:monetaryItemTypemonetaryAmount of allowance for credit losses related to recorded investment.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 15 -Subparagraph (a)(3) -URI http://asc.fasb.org/extlink&oid=7512638&loc=d3e5212-111524 false2Impaired Financing Receivable, Related Allowance97false 4us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceRecordedInvestmentus-gaap_truedebitinstantfalsefalsefalsefalsefalsefalsefalsefalse1truefalsefalse40004USD$falsefalsefalse2truefalsefalse50005USD$falsefalsefalsexbrli:monetaryItemTypemonetaryAmount of investment in impaired financing receivables for which there is no related allowance for credit losses.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 14A -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=7512638&loc=SL6953550-111524 false2Impaired Financing Receivable, with No Related Allowance, Recorded Investment98false 4us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceUnpaidPrincipalBalanceus-gaap_truedebitinstantfalsefalsefalsefalsefalsefalsefalsefalse1truefalsefalse50005USD$falsefalsefalse2truefalsefalse50005USD$falsefalsefalsexbrli:monetaryItemTypemonetaryAmount of unpaid principal balance of impaired financing receivables for which there is no related allowance for credit losses.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 15 -Subparagraph (a)(4) -URI http://asc.fasb.org/extlink&oid=7512638&loc=d3e5212-111524 false2Impaired Financing Receivable, with No Related Allowance, Unpaid Principal Balance99false 0truefalsetruefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalse28false USDtruefalse$AS_OF_Jun30_2013_bncn_CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAxis_OriginatedMember_us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis_ConsumerLoanMemberhttp://www.sec.gov/CIK0001210227instant2013-06-30T00:00:000001-01-01T00:00:00falsefalseConsumer and Other [Member]us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_ConsumerLoanMemberus-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxisexplicitMemberfalsefalseOriginated [Member]bncn_CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAxisxbrldihttp://xbrl.org/2006/xbrldibncn_OriginatedMemberbncn_CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAxisexplicitMemberUSDollarStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$nanafalse0Consumer and Other [Member] | Originated [Member]100true 3us-gaap_FinancingReceivableImpairedLineItemsus-gaap_truenadurationfalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalsexbrli:stringItemTypestringfalse0Financing Receivable, Impaired [Line Items]101false 4us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceRecordedInvestmentus-gaap_truedebitinstantfalsefalsefalsefalsefalsefalsefalsefalse1truefalsefalse6200062USD$falsefalsefalse2truefalsefalse00USD$falsefalsefalsexbrli:monetaryItemTypemonetaryAmount of investment in impaired financing receivables for which there is a related allowance for credit losses.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 14A -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=7512638&loc=SL6953550-111524 false2Impaired Financing Receivable, with Related Allowance, Recorded Investment102false 4us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceUnpaidPrincipalBalanceus-gaap_truedebitinstantfalsefalsefalsefalsefalsefalsefalsefalse1truefalsefalse6200062USD$falsefalsefalse2truefalsefalse00USD$falsefalsefalsexbrli:monetaryItemTypemonetaryUnpaid principal balance of impaired financing receivables for which there is a related allowance for credit losses.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 15 -Subparagraph (a)(4) -URI http://asc.fasb.org/extlink&oid=7512638&loc=d3e5212-111524 false2Impaired Financing Receivable, with Related Allowance, Unpaid Principal Balance103false 4us-gaap_ImpairedFinancingReceivableRelatedAllowanceus-gaap_truecreditinstantfalsefalsefalsefalsefalsefalsefalsefalse1truefalsefalse5200052USD$falsefalsefalse2truefalsefalse00USD$falsefalsefalsexbrli:monetaryItemTypemonetaryAmount of allowance for credit losses related to recorded investment.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 15 -Subparagraph (a)(3) -URI http://asc.fasb.org/extlink&oid=7512638&loc=d3e5212-111524 false2Impaired Financing Receivable, Related Allowance104false 4us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceRecordedInvestmentus-gaap_truedebitinstantfalsefalsefalsefalsefalsefalsefalsefalse1truefalsefalse00USD$falsefalsefalse2truefalsefalse124000124USD$falsefalsefalsexbrli:monetaryItemTypemonetaryAmount of investment in impaired financing receivables for which there is no related allowance for credit losses.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 14A -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=7512638&loc=SL6953550-111524 false2Impaired Financing Receivable, with No Related Allowance, Recorded Investment105false 4us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceUnpaidPrincipalBalanceus-gaap_truedebitinstantfalsefalsefalsefalsefalsefalsefalsefalse1truefalsefalse00USD$falsefalsefalse2truefalsefalse122000122USD$falsefalsefalsexbrli:monetaryItemTypemonetaryAmount of unpaid principal balance of impaired financing receivables for which there is no related allowance for credit losses.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 15 -Subparagraph (a)(4) -URI http://asc.fasb.org/extlink&oid=7512638&loc=d3e5212-111524 false2Impaired Financing Receivable, with No Related Allowance, Unpaid Principal Balance106false 0truefalsetruefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalse30false USDtruefalse$AS_OF_Jun30_2013_us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis_FinanceReceivablesMemberhttp://www.sec.gov/CIK0001210227instant2013-06-30T00:00:000001-01-01T00:00:00falsefalseTotal Loans [Member]us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_FinanceReceivablesMemberus-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxisexplicitMemberUSDollarStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$nanafalse0Total Loans [Member]107true 3us-gaap_FinancingReceivableImpairedLineItemsus-gaap_truenadurationfalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalsexbrli:stringItemTypestringfalse0Financing Receivable, Impaired [Line Items]108false 4us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceRecordedInvestmentus-gaap_truedebitinstantfalsefalsefalsefalsefalsefalsefalsefalse1truefalsefalse4858000048580USD$falsefalsefalse2truefalsefalse3233000032330USD$falsefalsefalsexbrli:monetaryItemTypemonetaryAmount of investment in impaired financing receivables for which there is a related allowance for credit losses.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 14A -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=7512638&loc=SL6953550-111524 false2Impaired Financing Receivable, with Related Allowance, Recorded Investment109false 4us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceUnpaidPrincipalBalanceus-gaap_truedebitinstantfalsefalsefalsefalsefalsefalsefalsefalse1truefalsefalse4853800048538USD$falsefalsefalse2truefalsefalse3256800032568USD$falsefalsefalsexbrli:monetaryItemTypemonetaryUnpaid principal balance of impaired financing receivables for which there is a related allowance for credit losses.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 15 -Subparagraph (a)(4) -URI http://asc.fasb.org/extlink&oid=7512638&loc=d3e5212-111524 false2Impaired Financing Receivable, with Related Allowance, Unpaid Principal Balance110false 4us-gaap_ImpairedFinancingReceivableRelatedAllowanceus-gaap_truecreditinstantfalsefalsefalsefalsefalsefalsefalsefalse1truefalsefalse55090005509USD$falsefalsefalse2truefalsefalse52190005219USD$falsefalsefalsexbrli:monetaryItemTypemonetaryAmount of allowance for credit losses related to recorded investment.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 15 -Subparagraph (a)(3) -URI http://asc.fasb.org/extlink&oid=7512638&loc=d3e5212-111524 false2Impaired Financing Receivable, Related Allowance111false 4us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceRecordedInvestmentus-gaap_truedebitinstantfalsefalsefalsefalsefalsefalsefalsefalse1truefalsefalse2555000025550USD$falsefalsefalse2truefalsefalse3951600039516USD$falsefalsefalsexbrli:monetaryItemTypemonetaryAmount of investment in impaired financing receivables for which there is no related allowance for credit losses.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 14A -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=7512638&loc=SL6953550-111524 false2Impaired Financing Receivable, with No Related Allowance, Recorded Investment112false 4us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceUnpaidPrincipalBalanceus-gaap_truedebitinstantfalsefalsefalsefalsefalsefalsefalsefalse1truefalsefalse2633900026339USD$falsefalsefalse2truefalsefalse3994700039947USD$falsefalsefalsexbrli:monetaryItemTypemonetaryAmount of unpaid principal balance of impaired financing receivables for which there is no related allowance for credit losses.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 15 -Subparagraph (a)(4) -URI http://asc.fasb.org/extlink&oid=7512638&loc=d3e5212-111524 false2Impaired Financing Receivable, with No Related Allowance, Unpaid Principal Balance113false 0truefalsetruefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalse32false USDtruefalse$AS_OF_Jun30_2013_bncn_CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAxis_AcquiredNonCoveredMember_us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis_FinanceReceivablesMemberhttp://www.sec.gov/CIK0001210227instant2013-06-30T00:00:000001-01-01T00:00:00falsefalseTotal Loans [Member]us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_FinanceReceivablesMemberus-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxisexplicitMemberfalsefalseAcquired Non-Covered [Member]bncn_CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAxisxbrldihttp://xbrl.org/2006/xbrldibncn_AcquiredNonCoveredMemberbncn_CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAxisexplicitMemberUSDollarStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$nanafalse0Total Loans [Member] | Acquired Non-Covered [Member]114true 3us-gaap_FinancingReceivableImpairedLineItemsus-gaap_truenadurationfalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalsexbrli:stringItemTypestringfalse0Financing Receivable, Impaired [Line Items]115false 4us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceRecordedInvestmentus-gaap_truedebitinstantfalsefalsefalsefalsefalsefalsefalsefalse1truefalsefalse00USD$falsefalsefalse2truefalsefalse13410001341USD$falsefalsefalsexbrli:monetaryItemTypemonetaryAmount of investment in impaired financing receivables for which there is a related allowance for credit losses.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 14A -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=7512638&loc=SL6953550-111524 false2Impaired Financing Receivable, with Related Allowance, Recorded Investment116false 4us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceUnpaidPrincipalBalanceus-gaap_truedebitinstantfalsefalsefalsefalsefalsefalsefalsefalse1truefalsefalse00USD$falsefalsefalse2truefalsefalse16470001647USD$falsefalsefalsexbrli:monetaryItemTypemonetaryUnpaid principal balance of impaired financing receivables for which there is a related allowance for credit losses.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 15 -Subparagraph (a)(4) -URI http://asc.fasb.org/extlink&oid=7512638&loc=d3e5212-111524 false2Impaired Financing Receivable, with Related Allowance, Unpaid Principal Balance117false 4us-gaap_ImpairedFinancingReceivableRelatedAllowanceus-gaap_truecreditinstantfalsefalsefalsefalsefalsefalsefalsefalse1truefalsefalse00USD$falsefalsefalse2truefalsefalse106000106USD$falsefalsefalsexbrli:monetaryItemTypemonetaryAmount of allowance for credit losses related to recorded investment.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 15 -Subparagraph (a)(3) -URI http://asc.fasb.org/extlink&oid=7512638&loc=d3e5212-111524 false2Impaired Financing Receivable, Related Allowance118false 4us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceRecordedInvestmentus-gaap_truedebitinstantfalsefalsefalsefalsefalsefalsefalsefalse1truefalsefalse23790002379USD$falsefalsefalse2truefalsefalse10180001018USD$falsefalsefalsexbrli:monetaryItemTypemonetaryAmount of investment in impaired financing receivables for which there is no related allowance for credit losses.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 14A -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=7512638&loc=SL6953550-111524 false2Impaired Financing Receivable, with No Related Allowance, Recorded Investment119false 4us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceUnpaidPrincipalBalanceus-gaap_truedebitinstantfalsefalsefalsefalsefalsefalsefalsefalse1truefalsefalse25450002545USD$falsefalsefalse2truefalsefalse11560001156USD$falsefalsefalsexbrli:monetaryItemTypemonetaryAmount of unpaid principal balance of impaired financing receivables for which there is no related allowance for credit losses.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 15 -Subparagraph (a)(4) -URI http://asc.fasb.org/extlink&oid=7512638&loc=d3e5212-111524 false2Impaired Financing Receivable, with No Related Allowance, Unpaid Principal Balance120false 0truefalsetruefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalse34false USDtruefalse$AS_OF_Jun30_2013_bncn_CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAxis_CoveredMember_us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis_FinanceReceivablesMemberhttp://www.sec.gov/CIK0001210227instant2013-06-30T00:00:000001-01-01T00:00:00falsefalseTotal Loans [Member]us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_FinanceReceivablesMemberus-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxisexplicitMemberfalsefalseCovered [Member]bncn_CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAxisxbrldihttp://xbrl.org/2006/xbrldibncn_CoveredMemberbncn_CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAxisexplicitMemberUSDollarStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$nanafalse0Total Loans [Member] | Covered [Member]121true 3us-gaap_FinancingReceivableImpairedLineItemsus-gaap_truenadurationfalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalsexbrli:stringItemTypestringfalse0Financing Receivable, Impaired [Line Items]122false 4us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceRecordedInvestmentus-gaap_truedebitinstantfalsefalsefalsefalsefalsefalsefalsefalse1truefalsefalse00USD$falsefalsefalse2truefalsefalse00USD$falsefalsefalsexbrli:monetaryItemTypemonetaryAmount of investment in impaired financing receivables for which there is a related allowance for credit losses.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 14A -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=7512638&loc=SL6953550-111524 false2Impaired Financing Receivable, with Related Allowance, Recorded Investment123false 4us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceUnpaidPrincipalBalanceus-gaap_truedebitinstantfalsefalsefalsefalsefalsefalsefalsefalse1truefalsefalse00USD$falsefalsefalse2truefalsefalse00USD$falsefalsefalsexbrli:monetaryItemTypemonetaryUnpaid principal balance of impaired financing receivables for which there is a related allowance for credit losses.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 15 -Subparagraph (a)(4) -URI http://asc.fasb.org/extlink&oid=7512638&loc=d3e5212-111524 false2Impaired Financing Receivable, with Related Allowance, Unpaid Principal Balance124false 4us-gaap_ImpairedFinancingReceivableRelatedAllowanceus-gaap_truecreditinstantfalsefalsefalsefalsefalsefalsefalsefalse1truefalsefalse00USD$falsefalsefalse2truefalsefalse00USD$falsefalsefalsexbrli:monetaryItemTypemonetaryAmount of allowance for credit losses related to recorded investment.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 15 -Subparagraph (a)(3) -URI http://asc.fasb.org/extlink&oid=7512638&loc=d3e5212-111524 false2Impaired Financing Receivable, Related Allowance125false 4us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceRecordedInvestmentus-gaap_truedebitinstantfalsefalsefalsefalsefalsefalsefalsefalse1truefalsefalse78420007842USD$falsefalsefalse2truefalsefalse67250006725USD$falsefalsefalsexbrli:monetaryItemTypemonetaryAmount of investment in impaired financing receivables for which there is no related allowance for credit losses.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 14A -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=7512638&loc=SL6953550-111524 false2Impaired Financing Receivable, with No Related Allowance, Recorded Investment126false 4us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceUnpaidPrincipalBalanceus-gaap_truedebitinstantfalsefalsefalsefalsefalsefalsefalsefalse1truefalsefalse81740008174USD$falsefalsefalse2truefalsefalse71110007111USD$falsefalsefalsexbrli:monetaryItemTypemonetaryAmount of unpaid principal balance of impaired financing receivables for which there is no related allowance for credit losses.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 15 -Subparagraph (a)(4) -URI http://asc.fasb.org/extlink&oid=7512638&loc=d3e5212-111524 false2Impaired Financing Receivable, with No Related Allowance, Unpaid Principal Balance127false 0truefalsetruefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalse36false USDtruefalse$AS_OF_Jun30_2013_bncn_CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAxis_OriginatedMember_us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis_FinanceReceivablesMemberhttp://www.sec.gov/CIK0001210227instant2013-06-30T00:00:000001-01-01T00:00:00falsefalseTotal Loans [Member]us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_FinanceReceivablesMemberus-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxisexplicitMemberfalsefalseOriginated [Member]bncn_CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAxisxbrldihttp://xbrl.org/2006/xbrldibncn_OriginatedMemberbncn_CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAxisexplicitMemberUSDollarStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$nanafalse0Total Loans [Member] | Originated [Member]128true 3us-gaap_FinancingReceivableImpairedLineItemsus-gaap_truenadurationfalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalsexbrli:stringItemTypestringfalse0Financing Receivable, Impaired [Line Items]129false 4us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceRecordedInvestmentus-gaap_truedebitinstantfalsefalsefalsefalsefalsefalsefalsefalse1truefalsefalse4858000048580USD$falsefalsefalse2truefalsefalse3098900030989USD$falsefalsefalsexbrli:monetaryItemTypemonetaryAmount of investment in impaired financing receivables for which there is a related allowance for credit losses.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 14A -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=7512638&loc=SL6953550-111524 false2Impaired Financing Receivable, with Related Allowance, Recorded Investment130false 4us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceUnpaidPrincipalBalanceus-gaap_truedebitinstantfalsefalsefalsefalsefalsefalsefalsefalse1truefalsefalse4853800048538USD$falsefalsefalse2truefalsefalse3092100030921USD$falsefalsefalsexbrli:monetaryItemTypemonetaryUnpaid principal balance of impaired financing receivables for which there is a related allowance for credit losses.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 15 -Subparagraph (a)(4) -URI http://asc.fasb.org/extlink&oid=7512638&loc=d3e5212-111524 false2Impaired Financing Receivable, with Related Allowance, Unpaid Principal Balance131false 4us-gaap_ImpairedFinancingReceivableRelatedAllowanceus-gaap_truecreditinstantfalsefalsefalsefalsefalsefalsefalsefalse1truefalsefalse55090005509USD$falsefalsefalse2truefalsefalse51130005113USD$falsefalsefalsexbrli:monetaryItemTypemonetaryAmount of allowance for credit losses related to recorded investment.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 15 -Subparagraph (a)(3) -URI http://asc.fasb.org/extlink&oid=7512638&loc=d3e5212-111524 false2Impaired Financing Receivable, Related Allowance132false 4us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceRecordedInvestmentus-gaap_truedebitinstantfalsefalsefalsefalsefalsefalsefalsefalse1truefalsefalse1532900015329USD$falsefalsefalse2truefalsefalse3177300031773USD$falsefalsefalsexbrli:monetaryItemTypemonetaryAmount of investment in impaired financing receivables for which there is no related allowance for credit losses.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 14A -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=7512638&loc=SL6953550-111524 false2Impaired Financing Receivable, with No Related Allowance, Recorded Investment133false 4us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceUnpaidPrincipalBalanceus-gaap_truedebitinstantfalsefalsefalsefalsefalsefalsefalsefalse1truefalsefalse1562000015620USD$falsetruefalse2truefalsefalse3168000031680USD$falsetruefalsexbrli:monetaryItemTypemonetaryAmount of unpaid principal balance of impaired financing receivables for which there is no related allowance for credit losses.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 15 -Subparagraph (a)(4) -URI http://asc.fasb.org/extlink&oid=7512638&loc=d3e5212-111524 false2Impaired Financing Receivable, with No Related Allowance, Unpaid Principal BalancefalseLoans and Allowance for Loan Losses (Details 8) (USD $)ThousandsUnKnownUnKnownUnKnowntruefalsefalseSheethttp://www.test2012TX.com/role/DisclosureLoansAndAllowanceForLoanLossesDetails82133