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Shareholders' Equity - Dividends and Share Repurchases (Details) (USD $)
In Thousands, except Share data, unless otherwise specified
0 Months Ended 12 Months Ended
Oct. 17, 2012
Aug. 15, 2012
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Dividends          
Dividends declared and paid by subsidiary     $ 2,350cvcy_DividendsDeclaredBySubsidiary $ 18,000cvcy_DividendsDeclaredBySubsidiary $ 3,000cvcy_DividendsDeclaredBySubsidiary
Dividends declared and paid during the period 480us-gaap_DividendsCommonStockCash   2,190us-gaap_DividendsCommonStockCash 2,048us-gaap_DividendsCommonStockCash 480us-gaap_DividendsCommonStockCash
Dividends declared, per share $ 0.05us-gaap_CommonStockDividendsPerShareDeclared   $ 0.20us-gaap_CommonStockDividendsPerShareDeclared $ 0.20us-gaap_CommonStockDividendsPerShareDeclared  
Share Repurchase Plan          
Repurchase authorization, percentage   5.00%cvcy_ShareRepurchaseProgramAuthorizedRepurchaseAmountPercentage      
Repurchase authorization, shares   479,850us-gaap_StockRepurchaseProgramNumberOfSharesAuthorizedToBeRepurchased      
Shares repurchased and retired during the period     58,100us-gaap_StockRepurchasedAndRetiredDuringPeriodShares    
Average price per share of shares repurchased and retired     $ 8.41us-gaap_TreasuryStockAcquiredAverageCostPerShare    
Shares repurchased and retired during the period, value     $ 488us-gaap_StockRepurchasedAndRetiredDuringPeriodValue