Income Taxes - Components of deferred income taxes (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Deferred tax assets:
Allowance for credit losses	$ 3,188	$ 3,492
Deferred compensation	4,979	5,102
Unrealized loss on available-for-sale investment securities	0	1,598
Net operating loss carryover from acquisition	698	206
Bank premises and equipment	186	264
Mark to market adjustment	98	154
Other deferred taxes	511	601
Other than temporary impairment	267	289
Loan and investment impairment	887	1,914
State Enterprise Zone credit carry-forward	1,444	981
State capital loss carry-forward	20	108
Alternative minimum tax credit	3,338	2,238
State taxes	1us-gaap_DeferredTaxAssetsStateTaxes	32us-gaap_DeferredTaxAssetsStateTaxes
Other	0us-gaap_DeferredTaxAssetsOther	0us-gaap_DeferredTaxAssetsOther
Partnership income	70cvcy_DeferredTaxAssetPartnershipIncome	70cvcy_DeferredTaxAssetPartnershipIncome
Total deferred tax assets	15,687us-gaap_DeferredTaxAssetsGross	17,049us-gaap_DeferredTaxAssetsGross
Valuation allowance	(20)	(108)
Net deferred tax asset after valuation allowance	15,667us-gaap_DeferredTaxAssetsNet	16,941us-gaap_DeferredTaxAssetsNet
Deferred tax liabilities:
Finance leases	(1,871)	(1,963)
Unrealized gain on available-for-sale investment securities	(3,661)	0
Core deposit intangible	(553)	(692)
FHLB stock	(319)	(319)
Loan origination costs	(553)	(406)
Total deferred tax liabilities	(6,957)us-gaap_DeferredTaxLiabilities	(3,380)us-gaap_DeferredTaxLiabilities
Net deferred tax assets	$ 8,710us-gaap_DeferredTaxAssetsLiabilitiesNet	$ 13,561us-gaap_DeferredTaxAssetsLiabilitiesNet

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Deferred Tax Assets, Fair Value Adjustment

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Deferred Tax Assets Loan And Investment Impairment

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Deferred Tax Assets Other Deferred Taxes

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Deferred Tax Liabilities Federal Home Loan Bank Stock

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Amount before allocation of valuation allowances of deferred tax asset attributable to deductible capital loss carryforwards.

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Amount after allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences and carryforwards, net of deferred tax liability attributable to taxable temporary differences.

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Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences from the provision for loan losses.

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Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences from unrealized losses on available-for-sale securities.

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Amount of deferred tax assets for which it is more likely than not that a tax benefit will not be realized.

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Amount of deferred tax liability attributable to taxable temporary differences from intangible assets other than goodwill.

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Amount of deferred tax liability attributable to taxable temporary differences from investments (excludes investments in subsidiaries and equity method investments).

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