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Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6943989&loc=d3e3602-108585 false2Stock-based Compensation12false 6us-gaap_IncreaseDecreaseInDeferredCompensationus-gaap_truedebitdurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1truefalsefalse363000363falsefalsefalse2truefalsefalse420000420falsefalsefalsexbrli:monetaryItemTypemonetaryThe increase (decrease) during the reporting period in the obligation created by employee agreements whereby earned compensation will be paid in the future.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6943989&loc=d3e3602-108585 false2Deferred Compensation13false 6us-gaap_BankOwnedLifeInsuranceIncomeus-gaap_truecreditdurationfalsefalsefalsefalsefalsefalsefalsetruenegatedLabel1truefalsefalse-1101000-1101falsefalsefalse2truefalsefalse-805000-805falsefalsefalsexbrli:monetaryItemTypemonetaryEarnings on or other increases in the value of the cash surrender value of bank owned life insurance policies.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 225 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-04.13) -URI http://asc.fasb.org/extlink&oid=6879574&loc=d3e536633-122882 false2Earnings on Bank-Owned Life Insurance14false 6us-gaap_GainLossOnSaleOfSecuritiesNetus-gaap_truecreditdurationfalsefalsefalsefalsefalsefalsefalsetruenegatedLabel1truefalsefalse5200052falsefalsefalse2truefalsefalse-1619000-1619falsefalsefalsexbrli:monetaryItemTypemonetaryThe net gain (loss) realized from the sale, exchange, redemption, or retirement of securities, not separately or otherwise categorized as trading, available-for-sale, or held-to-maturity.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 225 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-04.13(h)) -URI http://asc.fasb.org/extlink&oid=6879574&loc=d3e536633-122882 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 225 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-04.3) -URI http://asc.fasb.org/extlink&oid=6879464&loc=d3e573970-122913 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Paragraph 13 -Subparagraph h -Article 9 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Paragraph 3 -Article 7 false2Net Loss (Gain) on Investment Securities Available For Sale15false 6us-gaap_GainLossOnSaleOfPropertyPlantEquipmentus-gaap_truecreditdurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1truefalsefalse4200042falsefalsefalse2truefalsefalse183000183falsefalsefalsexbrli:monetaryItemTypemonetaryThe difference between the sale price or salvage price and the book value of a property, plant, and equipment asset that was sold or retired during the reporting period. 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Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 21 -URI http://asc.fasb.org/extlink&oid=6943989&loc=d3e3461-108585 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 230 -Section 55 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6587932&loc=d3e60097-112785 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 16 -URI http://asc.fasb.org/extlink&oid=6943989&loc=d3e3337-108585 false2Proceeds from Sale of Loans Held-for-sale20false 6us-gaap_IncreaseDecreaseInAccruedInterestReceivableNetus-gaap_truecreditdurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1truefalsefalse-312000-312falsefalsefalse2truefalsefalse11890001189falsefalsefalsexbrli:monetaryItemTypemonetaryThe increase (decrease) during the reporting period in the amount due from borrowers for interest payments.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 28 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6943989&loc=d3e3602-108585 false2Decrease in Accrued Interest Receivable21false 6bncn_IncreaseDecreaseInFdicIndemnificationAssetbncn_falsecreditdurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1truefalsefalse1614000016140falsefalsefalse2truefalsefalse3333100033331falsefalsefalsexbrli:monetaryItemTypemonetaryNo authoritative reference available.No definition available.false2Decrease in FDIC Indemnification Asset22false 6us-gaap_IncreaseDecreaseInOtherOperatingAssetsus-gaap_truecreditdurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1truefalsefalse61960006196falsefalsefalse2truefalsefalse847000847falsefalsefalsexbrli:monetaryItemTypemonetaryThe increase (decrease) during the reporting period in other assets used in operating activities not separately disclosed in the statement of cash flows. 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Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 45 -Paragraph 11 -URI http://asc.fasb.org/extlink&oid=6871852&loc=d3e26853-111562 false2Purchases of Investment Securities Held to Maturity28false 5us-gaap_ProceedsFromSaleOfAvailableForSaleSecuritiesus-gaap_truedebitdurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1truefalsefalse1579700015797falsefalsefalse2truefalsefalse3957100039571falsefalsefalsexbrli:monetaryItemTypemonetaryThe cash inflow associated with the sale of debt and equity securities classified as available-for-sale securities.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Investing Activities -URI http://asc.fasb.org/extlink&oid=6516133 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 115 -Paragraph 18 -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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Reference 7: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 12 -Subparagraph (a),(b) -URI http://asc.fasb.org/extlink&oid=6943989&loc=d3e3179-108585 false2Proceeds from Sales of Investment Securities Available for Sale29false 5us-gaap_ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecuritiesus-gaap_truedebitdurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1truefalsefalse3415300034153falsefalsefalse2truefalsefalse2155200021552falsefalsefalsexbrli:monetaryItemTypemonetaryThe cash inflow associated with maturities (principal being due), prepayments and calls (requests of early payments) on securities not classified as either held-to-maturity securities or trading securities which are classified as available-for-sale securities.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Investing Activities -URI http://asc.fasb.org/extlink&oid=6516133 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher OTS -Name Federal Regulation (FR) -Number Title 12 -Section 563c.102 -Chapter V -Subsection III -LegacyDoc This is a non-GAAP reference that was included in the 2009 taxonomy. 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Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 13 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=6943989&loc=d3e3213-108585 false2Investment in Other Real Estate Owned37false 5us-gaap_ProceedsFromSaleOfOtherRealEstateus-gaap_truedebitdurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1truefalsefalse1827600018276falsefalsefalse2truefalsefalse2560000025600falsefalsefalsexbrli:monetaryItemTypemonetaryThe cash inflow associated with the sale of other real estate not otherwise defined in the taxonomy.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=6943989&loc=d3e3179-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Investing Activities -URI http://asc.fasb.org/extlink&oid=6516133 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 15 -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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Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 25 -Subparagraph (f) -URI http://asc.fasb.org/extlink&oid=6943989&loc=d3e3536-108585 false2Income Taxes Paid55true 4us-gaap_CashFlowNoncashInvestingAndFinancingActivitiesDisclosureAbstractus-gaap_truenadurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalsexbrli:stringItemTypestringfalse0Summary of Noncash Investing and Financing Activities56false 5bncn_Transferfromloanstoforeclosedassetsbncn_falsedebitdurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1truefalsefalse1413200014132falsefalsefalse2truefalsefalse2371600023716falsefalsefalsexbrli:monetaryItemTypemonetaryNo authoritative reference available.No definition available.false2Transfer of Loans to Foreclosed Real Estate57false 5bncn_Increaseinfdicindemnificationassetfromlossesbncn_falsedebitdurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1truefalsefalse35590003559falsefalsefalse2truefalsefalse95200009520falsefalsefalsexbrli:monetaryItemTypemonetaryNo authoritative reference available.No definition available.false2FDIC Indemnification Asset Increase for Losses, Net58false 5bncn_Investmentsecuritiestransferredfromavailableforsaletoheldtomaturitybncn_falsedebitinstantfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1truefalsefalse8652600086526USD$falsetruefalse2truefalsefalse00USD$falsetruefalsexbrli:monetaryItemTypemonetaryNo authoritative reference available.No definition available.false2Transfer of Investment Securities from Available-for-Sale to Held-to-MaturityfalseConsolidated Statements of Cash Flows (USD $)ThousandsUnKnownUnKnownUnKnowntruefalsefalseSheethttp://www.test2012TX.com/role/StatementConsolidatedStatementsOfCashFlows258