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Loans and Lease Finance Receivables and Allowance for Loan Losses - Schedule of Held-for-Investment Loans, Excluding PCI Loans, Individually Evaluated for Impairment by Class of Loans (Parenthetical) (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014	Dec. 31, 2014
Receivables [Abstract]
Recorded Investment, With no related allowance recorded	$ 66,670us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceRecordedInvestment	$ 90,983us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceRecordedInvestment	$ 81,905us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceRecordedInvestment
Recorded Investment, With a related allowance recorded	1,707us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceRecordedInvestment	15,613us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceRecordedInvestment	3,887us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceRecordedInvestment
Recorded Investment, Total impaired loans	68,377us-gaap_ImpairedFinancingReceivableRecordedInvestment	106,596us-gaap_ImpairedFinancingReceivableRecordedInvestment	85,792us-gaap_ImpairedFinancingReceivableRecordedInvestment
Unpaid Principal Balance, With no related allowance recorded	79,944us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceUnpaidPrincipalBalance	101,579us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceUnpaidPrincipalBalance	95,968us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceUnpaidPrincipalBalance
Unpaid Principal Balance, With a related allowance recorded	2,119us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceUnpaidPrincipalBalance	17,146us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceUnpaidPrincipalBalance	4,559us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceUnpaidPrincipalBalance
Unpaid Principal Balance, Total impaired loans	82,063us-gaap_ImpairedFinancingReceivableUnpaidPrincipalBalance	118,725us-gaap_ImpairedFinancingReceivableUnpaidPrincipalBalance	100,527us-gaap_ImpairedFinancingReceivableUnpaidPrincipalBalance
Related Allowance, With no related allowance recorded	0cvbf_ImpairedFinancingReceivableWithNoRelatedAllowance	0cvbf_ImpairedFinancingReceivableWithNoRelatedAllowance	0cvbf_ImpairedFinancingReceivableWithNoRelatedAllowance
Related Allowance, With a related allowance recorded	794cvbf_ImpairedFinancingReceivableRelatedAllowanceWithRelatedAllowance	4,001cvbf_ImpairedFinancingReceivableRelatedAllowanceWithRelatedAllowance	1,549cvbf_ImpairedFinancingReceivableRelatedAllowanceWithRelatedAllowance
Related Allowance, Total impaired loans	794us-gaap_ImpairedFinancingReceivableRelatedAllowance	4,001us-gaap_ImpairedFinancingReceivableRelatedAllowance	1,549us-gaap_ImpairedFinancingReceivableRelatedAllowance
Average Recorded Investment, With no related allowance recorded	67,533us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceAverageRecordedInvestment	91,747us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceAverageRecordedInvestment
Average Recorded Investment, With a related allowance recorded	1,734us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceAverageRecordedInvestment	15,836us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceAverageRecordedInvestment
Average Recorded Investment, Total impaired loans	69,267us-gaap_ImpairedFinancingReceivableAverageRecordedInvestment	107,583us-gaap_ImpairedFinancingReceivableAverageRecordedInvestment
Interest Income Recognized, With no related allowance recorded	647us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceInterestIncomeAccrualMethod	779us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceInterestIncomeAccrualMethod
Interest Income Recognized, With a related allowance recorded	0us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceInterestIncomeAccrualMethod	75us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceInterestIncomeAccrualMethod
Interest Income Recognized, Total impaired loans	$ 647us-gaap_ImpairedFinancingReceivableInterestIncomeAccrualMethod	$ 854us-gaap_ImpairedFinancingReceivableInterestIncomeAccrualMethod

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