<?xml version="1.0" encoding="utf-8"?>
<FilingSummary xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema">
  <Version>2.4.0.6</Version>
  <ProcessingTime />
  <ReportFormat>Html</ReportFormat>
  <ContextCount>293</ContextCount>
  <ElementCount>236</ElementCount>
  <EntityCount>1</EntityCount>
  <FootnotesReported>false</FootnotesReported>
  <SegmentCount>41</SegmentCount>
  <ScenarioCount>0</ScenarioCount>
  <TuplesReported>false</TuplesReported>
  <UnitCount>4</UnitCount>
  <MyReports>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R1.htm</HtmlFileName>
      <LongName>000100 - Document - Document and Entity Information</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://cecilbank.com/role/DocumentAndEntityInformation</Role>
      <ShortName>Document and Entity Information</ShortName>
    </Report>
    <Report>
      <IsDefault>true</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R2.htm</HtmlFileName>
      <LongName>010000 - Statement - CONSOLIDATED BALANCE SHEETS</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://cecilbank.com/role/ConsolidatedBalanceSheets</Role>
      <ShortName>CONSOLIDATED BALANCE SHEETS</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R3.htm</HtmlFileName>
      <LongName>010100 - Statement - CONSOLIDATED BALANCE SHEETS (Parenthetical)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://cecilbank.com/role/ConsolidatedBalanceSheetsParenthetical</Role>
      <ShortName>CONSOLIDATED BALANCE SHEETS (Parenthetical)</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R4.htm</HtmlFileName>
      <LongName>020000 - Statement - CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE INCOME (LOSS) (UNAUDITED)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://cecilbank.com/role/ConsolidatedStatementsOfOperationsAndComprehensiveIncomeLossUnaudited</Role>
      <ShortName>CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE INCOME (LOSS) (UNAUDITED)</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R5.htm</HtmlFileName>
      <LongName>030000 - Statement - CONSOLIDATED STATEMENTS OF CASH FLOWS</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://cecilbank.com/role/ConsolidatedStatementsOfCashFlows</Role>
      <ShortName>CONSOLIDATED STATEMENTS OF CASH FLOWS</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R6.htm</HtmlFileName>
      <LongName>060100 - Disclosure - GENERAL</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://cecilbank.com/role/General</Role>
      <ShortName>GENERAL</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R7.htm</HtmlFileName>
      <LongName>060200 - Disclosure - FINANCIAL STATEMENT PREPARATION</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://cecilbank.com/role/FinancialStatementPreparation</Role>
      <ShortName>FINANCIAL STATEMENT PREPARATION</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R8.htm</HtmlFileName>
      <LongName>060300 - Disclosure - RECENT ACCOUNTING PRONOUNCEMENTS</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://cecilbank.com/role/RecentAccountingPronouncements</Role>
      <ShortName>RECENT ACCOUNTING PRONOUNCEMENTS</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R9.htm</HtmlFileName>
      <LongName>060400 - Disclosure - EARNINGS PER SHARE</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://cecilbank.com/role/EarningsPerShare</Role>
      <ShortName>EARNINGS PER SHARE</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R10.htm</HtmlFileName>
      <LongName>060500 - Disclosure - ACCOUNTING FOR STOCK BASED COMPENSATION PLANS</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://cecilbank.com/role/AccountingForStockBasedCompensationPlans</Role>
      <ShortName>ACCOUNTING FOR STOCK BASED COMPENSATION PLANS</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R11.htm</HtmlFileName>
      <LongName>060600 - Disclosure - ASSETS MEASURED AT FAIR VALUE</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://cecilbank.com/role/AssetsMeasuredAtFairValue</Role>
      <ShortName>ASSETS MEASURED AT FAIR VALUE</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R12.htm</HtmlFileName>
      <LongName>060700 - Disclosure - FAIR VALUE OF FINANCIAL INSTRUMENTS</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://cecilbank.com/role/FairValueOfFinancialInstruments</Role>
      <ShortName>FAIR VALUE OF FINANCIAL INSTRUMENTS</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R13.htm</HtmlFileName>
      <LongName>060800 - Disclosure - INVESTMENT SECURITIES</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://cecilbank.com/role/InvestmentSecurities</Role>
      <ShortName>INVESTMENT SECURITIES</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R14.htm</HtmlFileName>
      <LongName>060900 - Disclosure - CREDIT QUALITY OF LOANS RECEIVABLE AND ALLOWANCE FOR LOAN LOSSES</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://cecilbank.com/role/CreditQualityOfLoansReceivableAndAllowanceForLoanLosses</Role>
      <ShortName>CREDIT QUALITY OF LOANS RECEIVABLE AND ALLOWANCE FOR LOAN LOSSES</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R15.htm</HtmlFileName>
      <LongName>080400 - Disclosure - EARNINGS PER SHARE (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://cecilbank.com/role/EarningsPerShareTables</Role>
      <ShortName>EARNINGS PER SHARE (Tables)</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R16.htm</HtmlFileName>
      <LongName>080500 - Disclosure - ACCOUNTING FOR STOCK BASED COMPENSATION PLANS (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://cecilbank.com/role/AccountingForStockBasedCompensationPlansTables</Role>
      <ShortName>ACCOUNTING FOR STOCK BASED COMPENSATION PLANS (Tables)</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R17.htm</HtmlFileName>
      <LongName>080600 - Disclosure - ASSETS MEASURED AT FAIR VALUE (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://cecilbank.com/role/AssetsMeasuredAtFairValueTables</Role>
      <ShortName>ASSETS MEASURED AT FAIR VALUE (Tables)</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R18.htm</HtmlFileName>
      <LongName>080700 - Disclosure - FAIR VALUE OF FINANCIAL INSTRUMENTS (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://cecilbank.com/role/FairValueOfFinancialInstrumentsTables</Role>
      <ShortName>FAIR VALUE OF FINANCIAL INSTRUMENTS (Tables)</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R19.htm</HtmlFileName>
      <LongName>080800 - Disclosure - INVESTMENT SECURITIES (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://cecilbank.com/role/InvestmentSecuritiesTables</Role>
      <ShortName>INVESTMENT SECURITIES (Tables)</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R20.htm</HtmlFileName>
      <LongName>080900 - Disclosure - CREDIT QUALITY OF LOANS RECEIVABLE AND ALLOWANCE FOR LOAN LOSSES (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://cecilbank.com/role/CreditQualityOfLoansReceivableAndAllowanceForLoanLossesTables</Role>
      <ShortName>CREDIT QUALITY OF LOANS RECEIVABLE AND ALLOWANCE FOR LOAN LOSSES (Tables)</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R21.htm</HtmlFileName>
      <LongName>090300 - Disclosure - RECENT ACCOUNTING PRONOUNCEMENTS (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://cecilbank.com/role/RecentAccountingPronouncementsDetails</Role>
      <ShortName>RECENT ACCOUNTING PRONOUNCEMENTS (Details)</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R22.htm</HtmlFileName>
      <LongName>090400 - Disclosure - EARNINGS PER SHARE (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://cecilbank.com/role/EarningsPerShareDetails</Role>
      <ShortName>EARNINGS PER SHARE (Details)</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R23.htm</HtmlFileName>
      <LongName>090500 - Disclosure - ACCOUNTING FOR STOCK BASED COMPENSATION PLANS (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://cecilbank.com/role/AccountingForStockBasedCompensationPlansDetails</Role>
      <ShortName>ACCOUNTING FOR STOCK BASED COMPENSATION PLANS (Details)</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R24.htm</HtmlFileName>
      <LongName>090600 - Disclosure - ASSETS MEASURED AT FAIR VALUE (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://cecilbank.com/role/AssetsMeasuredAtFairValueDetails</Role>
      <ShortName>ASSETS MEASURED AT FAIR VALUE (Details)</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R25.htm</HtmlFileName>
      <LongName>090700 - Disclosure - FAIR VALUE OF FINANCIAL INSTRUMENTS (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://cecilbank.com/role/FairValueOfFinancialInstrumentsDetails</Role>
      <ShortName>FAIR VALUE OF FINANCIAL INSTRUMENTS (Details)</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R26.htm</HtmlFileName>
      <LongName>090800 - Disclosure - INVESTMENT SECURITIES (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://cecilbank.com/role/InvestmentSecuritiesDetails</Role>
      <ShortName>INVESTMENT SECURITIES (Details)</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R27.htm</HtmlFileName>
      <LongName>090900 - Disclosure - CREDIT QUALITY OF LOANS RECEIVABLE AND ALLOWANCE FOR LOAN LOSSES (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://cecilbank.com/role/CreditQualityOfLoansReceivableAndAllowanceForLoanLossesDetails</Role>
      <ShortName>CREDIT QUALITY OF LOANS RECEIVABLE AND ALLOWANCE FOR LOAN LOSSES (Details)</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R28.htm</HtmlFileName>
      <LongName>090902 - Disclosure - CREDIT QUALITY OF LOANS RECEIVABLE AND ALLOWANCE FOR LOAN LOSSES, AGE ANALYSIS OF PAST DUE LOANS RECEIVABLE (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://cecilbank.com/role/CreditQualityOfLoansReceivableAndAllowanceForLoanLossesAgeAnalysisOfPastDueLoansReceivableDetails</Role>
      <ShortName>CREDIT QUALITY OF LOANS RECEIVABLE AND ALLOWANCE FOR LOAN LOSSES, AGE ANALYSIS OF PAST DUE LOANS RECEIVABLE (Details)</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R29.htm</HtmlFileName>
      <LongName>090904 - Disclosure - CREDIT QUALITY OF LOANS RECEIVABLE AND ALLOWANCE FOR LOAN LOSSES, ALLOWANCE FOR LOAN LOSSES AND RECORDED INVESTMENT IN LOANS RECEIVABLE (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://cecilbank.com/role/CreditQualityOfLoansReceivableAndAllowanceForLoanLossesAllowanceForLoanLossesAndRecordedInvestmentInLoansReceivableDetails</Role>
      <ShortName>CREDIT QUALITY OF LOANS RECEIVABLE AND ALLOWANCE FOR LOAN LOSSES, ALLOWANCE FOR LOAN LOSSES AND RECORDED INVESTMENT IN LOANS RECEIVABLE (Details)</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R30.htm</HtmlFileName>
      <LongName>090906 - Disclosure - CREDIT QUALITY OF LOANS RECEIVABLE AND ALLOWANCE FOR LOAN LOSSES, TROUBLED DEBT RESTRUCTURINGS (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://cecilbank.com/role/CreditQualityOfLoansReceivableAndAllowanceForLoanLossesTroubledDebtRestructuringsDetails</Role>
      <ShortName>CREDIT QUALITY OF LOANS RECEIVABLE AND ALLOWANCE FOR LOAN LOSSES, TROUBLED DEBT RESTRUCTURINGS (Details)</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R31.htm</HtmlFileName>
      <LongName>090908 - Disclosure - CREDIT QUALITY OF LOANS RECEIVABLE AND ALLOWANCE FOR LOAN LOSSES, IMPAIRED LOANS (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://cecilbank.com/role/CreditQualityOfLoansReceivableAndAllowanceForLoanLossesImpairedLoansDetails</Role>
      <ShortName>CREDIT QUALITY OF LOANS RECEIVABLE AND ALLOWANCE FOR LOAN LOSSES, IMPAIRED LOANS (Details)</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <LongName>All Reports</LongName>
      <ReportType>Book</ReportType>
      <ShortName>All Reports</ShortName>
    </Report>
  </MyReports>
  <Logs>
    <Log type="Info">Element cecb_LoanToValueRatio had a mix of decimals attribute values: 1 2.</Log>
    <Log type="Info">Element us-gaap_PreferredStockLiquidationPreference had a mix of decimals attribute values: 0 2.</Log>
    <Log type="Info">Process Flow-Through: 010000 - Statement - CONSOLIDATED BALANCE SHEETS</Log>
    <Log type="Info">	Process Flow-Through: Removing column 'Jun. 30, 2011'</Log>
    <Log type="Info">	Process Flow-Through: Removing column 'Dec. 31, 2010'</Log>
    <Log type="Info">Process Flow-Through: 010100 - Statement - CONSOLIDATED BALANCE SHEETS (Parenthetical)</Log>
    <Log type="Info">Process Flow-Through: 020000 - Statement - CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE INCOME (LOSS) (UNAUDITED)</Log>
    <Log type="Info">Process Flow-Through: 030000 - Statement - CONSOLIDATED STATEMENTS OF CASH FLOWS</Log>
  </Logs>
  <InputFiles>
    <File>cecb-20120630.xml</File>
    <File>cecb-20120630.xsd</File>
    <File>cecb-20120630_cal.xml</File>
    <File>cecb-20120630_def.xml</File>
    <File>cecb-20120630_lab.xml</File>
    <File>cecb-20120630_pre.xml</File>
  </InputFiles>
  <SupplementalFiles />
  <BaseTaxonomies />
  <HasPresentationLinkbase>true</HasPresentationLinkbase>
  <HasCalculationLinkbase>true</HasCalculationLinkbase>
</FilingSummary>
