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Loans and the Allowance for Loan Losses (Schedule of Troubled Debt Restructuring) (Details) (USD $) In Thousands, unless otherwise specified | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2012 | Jun. 30, 2012
Commercial real estate [Member] |  |
Financing Receivable, Impaired [Line Items] |  |
Troubled debt restructurings: Number of Loans |  | 1
Pre-restructuring Outstanding Recorded Investment |  | $ 225
Post-restructuring Outstanding Recorded Investment |  | 225
Residential mortgage [Member] |  |
Financing Receivable, Impaired [Line Items] |  |
Troubled debt restructurings: Number of Loans | 1 | 2
Pre-restructuring Outstanding Recorded Investment | 1,354 | 2,068
Post-restructuring Outstanding Recorded Investment | $ 1,354 | $ 2,059

X
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X
- Definition Amount of investment in financing receivables (after modification) modified by troubled debt restructurings. + References No definition available. + Details
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Namespace Prefix: | cnbc_
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X
- Definition Amount of investment in financing receivables (before modification) modified by troubled debt restructurings. + References No definition available. + Details
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Namespace Prefix: | cnbc_
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X
- Details
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