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Income Taxes - Schedule of Income Tax Asset (Detail) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Current:
Income tax asset , Current, Total	$ 8,959cvbf_IncomeTaxAssetCurrent	$ 4,175cvbf_IncomeTaxAssetCurrent
Deferred:
Income tax asset , Deferred, Total	22,502us-gaap_DeferredTaxAssetsNet	55,611us-gaap_DeferredTaxAssetsNet
Income tax asset (liability), Total	31,461cvbf_IncomeTaxAssetNet	59,786cvbf_IncomeTaxAssetNet
Federal [Member]
Current:
Income tax asset , Current, Total	4,522	2,838
Deferred:
Income tax asset , Deferred, Total	18,304	42,545
State [Member]
Current:
Income tax asset , Current, Total	4,437	1,337
Deferred:
Income tax asset , Deferred, Total	$ 4,198	$ 13,066