2.3.0.11 Html 25 130 1 false 9 0 false 3 true false R1.htm 0001000 - Document - Document and Entity Information Sheet http://www.citynatbank.com/role/DocumentAndEntityInformation Document and Entity Information false false R2.htm 1001000 - Statement - Consolidated Balance Sheets Sheet http://www.citynatbank.com/role/ConsolidatedBalanceSheets Consolidated Balance Sheets false false R3.htm 1001500 - Statement - Consolidated Balance Sheets (Parentheticals) Sheet http://www.citynatbank.com/role/ConsolidatedBalanceSheetsParentheticals Consolidated Balance Sheets (Parentheticals) false false R4.htm 1002000 - Statement - Consolidated Statements of Operations (Unaudited) Sheet http://www.citynatbank.com/role/ConsolidatedStatementsOfOperationsUnaudited Consolidated Statements of Operations (Unaudited) false false R5.htm 1003000 - Statement - Consolidated Statement of Cash Flows (Unaudited) Sheet http://www.citynatbank.com/role/ConsolidatedStatementOfCashFlowsUnaudited Consolidated Statement of Cash Flows (Unaudited) false false R6.htm 2101100 - Disclosure - Principles of consolidation Sheet http://www.citynatbank.com/role/PrinciplesOfConsolidation Principles of consolidation false false R7.htm 2104100 - Disclosure - Basis of presentation Sheet http://www.citynatbank.com/role/BasisOfPresentation Basis of presentation false false R8.htm 2107100 - Disclosure - Going concern/regulatory compliance Sheet http://www.citynatbank.com/role/GoingConcernregulatoryCompliance Going concern/regulatory compliance false false R9.htm 2110100 - Disclosure - Net loss per common share Sheet http://www.citynatbank.com/role/NetLossPerCommonShare Net loss per common share false false R10.htm 2113100 - Disclosure - Comprehensive (loss) income Sheet http://www.citynatbank.com/role/ComprehensiveLossIncome Comprehensive (loss) income false false R11.htm 2116100 - Disclosure - Recent accounting pronouncements Sheet http://www.citynatbank.com/role/RecentAccountingPronouncements Recent accounting pronouncements false false R12.htm 2119100 - Disclosure - Investment securities available for sale Sheet http://www.citynatbank.com/role/InvestmentSecuritiesAvailableForSale Investment securities available for sale false false R13.htm 2122100 - Disclosure - Investment securities held to maturity Sheet http://www.citynatbank.com/role/InvestmentSecuritiesHeldToMaturity Investment securities held to maturity false false R14.htm 2125100 - Disclosure - Loans Sheet http://www.citynatbank.com/role/Loans Loans false false R15.htm 2128100 - Disclosure - Fair value measurement of assets and liabilities Sheet http://www.citynatbank.com/role/FairValueMeasurementOfAssetsAndLiabilities Fair value measurement of assets and liabilities false false R16.htm 2131100 - Disclosure - Long-term debt Sheet http://www.citynatbank.com/role/LongTermDebt Long-term debt false false R17.htm 2134100 - Disclosure - Fair value of financial instruments Sheet http://www.citynatbank.com/role/FairValueOfFinancialInstruments Fair value of financial instruments false false R18.htm 2137100 - Disclosure - Subsequent event Sheet http://www.citynatbank.com/role/SubsequentEvent Subsequent event false false All Reports Book All Reports 'Monetary' elements on report '1003000 - Statement - Consolidated Statement of Cash Flows (Unaudited)' had a mix of different decimal attribute values. Process Flow-Through: 1001000 - Statement - Consolidated Balance Sheets Process Flow-Through: 1001500 - Statement - Consolidated Balance Sheets (Parentheticals) Process Flow-Through: 1002000 - Statement - Consolidated Statements of Operations (Unaudited) Process Flow-Through: 1003000 - Statement - Consolidated Statement of Cash Flows (Unaudited) cnbc-20110630.xml cnbc-20110630.xsd cnbc-20110630_cal.xml cnbc-20110630_def.xml cnbc-20110630_lab.xml cnbc-20110630_pre.xml true true