Consolidated Statements of Earnings and Comprehensive Income (USD $) In Thousands, except Per Share data, unless otherwise specified	12 Months Ended
Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Interest income:
Loans and leases, including fees	$ 181,619	$ 179,631	$ 205,753
Investment securities:
Taxable	47,465us-gaap_InterestIncomeSecuritiesTaxable	28,374us-gaap_InterestIncomeSecuritiesTaxable	32,025us-gaap_InterestIncomeSecuritiesTaxable
Tax-advantaged	20,913	22,025	22,718
Total investment income	68,378	50,399	54,743
Dividends from FHLB stock	2,130cvbf_DividendsFromFhlbStock	2,033cvbf_DividendsFromFhlbStock	671cvbf_DividendsFromFhlbStock
Federal funds sold	427us-gaap_InterestIncomeFederalFundsSold	221us-gaap_InterestIncomeFederalFundsSold	616us-gaap_InterestIncomeFederalFundsSold
Interest-earning deposits with other institutions	349	489	439
Total interest income	252,903	232,773	262,222
Interest expense:
Deposits	4,977us-gaap_InterestExpenseDeposits	4,887us-gaap_InterestExpenseDeposits	5,911us-gaap_InterestExpenseDeposits
Borrowings	10,991	10,999	16,662
Junior subordinated debentures	421	621	2,699
Total interest expense	16,389us-gaap_InterestExpense	16,507us-gaap_InterestExpense	25,272us-gaap_InterestExpense
Net interest income before provision for loan losses	236,514us-gaap_InterestIncomeExpenseNet	216,266us-gaap_InterestIncomeExpenseNet	236,950us-gaap_InterestIncomeExpenseNet
(Recapture of) provision for loan losses	(16,100)	(16,750)	0
Net interest income after provision for loan losses	252,614	233,016	236,950
Noninterest income:
Service charges on deposit accounts	15,778	15,923	16,106
Trust and investment services	8,118	8,071	8,169
Bankcard services	3,386us-gaap_FeesAndCommissionsCreditCards	3,481us-gaap_FeesAndCommissionsCreditCards	3,650us-gaap_FeesAndCommissionsCreditCards
BOLI income	2,428us-gaap_BankOwnedLifeInsuranceIncome	2,511us-gaap_BankOwnedLifeInsuranceIncome	2,973us-gaap_BankOwnedLifeInsuranceIncome
Gain on sale of loans held-for-sale	6,001us-gaap_GainLossOnSalesOfLoansNet	0us-gaap_GainLossOnSalesOfLoansNet	0us-gaap_GainLossOnSalesOfLoansNet
Gain on sale of investment securities, net	0us-gaap_GainLossOnSaleOfSecuritiesNet	2,094us-gaap_GainLossOnSaleOfSecuritiesNet	0us-gaap_GainLossOnSaleOfSecuritiesNet
Decrease in FDIC loss sharing asset, net	(3,591)	(12,860)	(21,916)
Gain on OREO, net	1,020cvbf_GainOnOtherRealEstateOwnedNet	3,131cvbf_GainOnOtherRealEstateOwnedNet	1,544cvbf_GainOnOtherRealEstateOwnedNet
Other	3,272us-gaap_NoninterestIncomeOther	2,936us-gaap_NoninterestIncomeOther	5,377us-gaap_NoninterestIncomeOther
Total noninterest income	36,412us-gaap_NoninterestIncome	25,287us-gaap_NoninterestIncome	15,903us-gaap_NoninterestIncome
Noninterest expense:
Salaries and employee benefits	77,118us-gaap_LaborAndRelatedExpense	71,015us-gaap_LaborAndRelatedExpense	68,496us-gaap_LaborAndRelatedExpense
Occupancy and equipment	15,264us-gaap_OccupancyNet	14,504us-gaap_OccupancyNet	15,473us-gaap_OccupancyNet
Professional services	6,018us-gaap_ProfessionalFees	5,709us-gaap_ProfessionalFees	7,170us-gaap_ProfessionalFees
Software licenses and maintenance	4,464cvbf_SoftwareLicensesAndMaintenance	4,671cvbf_SoftwareLicensesAndMaintenance	4,279cvbf_SoftwareLicensesAndMaintenance
Promotion	5,195us-gaap_MarketingExpense	4,681us-gaap_MarketingExpense	4,869us-gaap_MarketingExpense
Provision for unfunded loan commitments	(1,250)	500	(1,000)
Amortization of intangible assets	1,137us-gaap_AmortizationOfIntangibleAssets	1,127us-gaap_AmortizationOfIntangibleAssets	2,159us-gaap_AmortizationOfIntangibleAssets
Debt termination expense	0cvbf_PrepaymentPenaltiesOnBorrowings	0cvbf_PrepaymentPenaltiesOnBorrowings	20,379cvbf_PrepaymentPenaltiesOnBorrowings
OREO expense	307us-gaap_ForeclosedRealEstateExpense	856us-gaap_ForeclosedRealEstateExpense	2,146us-gaap_ForeclosedRealEstateExpense
Insurance reimbursements	(372)us-gaap_InsuranceRecoveries	(4,155)us-gaap_InsuranceRecoveries	(921)us-gaap_InsuranceRecoveries
Acquisition related expenses	1,973	0	0
Other	16,375us-gaap_OtherNoninterestExpense	15,120us-gaap_OtherNoninterestExpense	15,110us-gaap_OtherNoninterestExpense
Total noninterest expense	126,229us-gaap_NoninterestExpense	114,028us-gaap_NoninterestExpense	138,160us-gaap_NoninterestExpense
Earnings before income taxes	162,797	144,275	114,693
Income taxes	58,776us-gaap_IncomeTaxExpenseBenefit	48,667us-gaap_IncomeTaxExpenseBenefit	37,413us-gaap_IncomeTaxExpenseBenefit
Net earnings	104,021us-gaap_NetIncomeLoss	95,608us-gaap_NetIncomeLoss	77,280us-gaap_NetIncomeLoss
Other comprehensive (loss) income:
Unrealized (loss) gain on securities arising during the period	69,661	(88,562)	3,074
Less: Reclassification adjustment for net gain on securities included in net income	0	(2,094)	0
Other comprehensive (loss) income, before tax	69,661	(90,656)	3,074
Less: income tax benefit (expense) related to items of other comprehensive income	(29,256)	38,075	(1,292)
Net change, After-Tax	40,405	(52,581)	1,782
Comprehensive income	$ 144,426us-gaap_ComprehensiveIncomeNetOfTax	$ 43,027us-gaap_ComprehensiveIncomeNetOfTax	$ 79,062us-gaap_ComprehensiveIncomeNetOfTax
Basic earnings per common share	$ 0.98us-gaap_EarningsPerShareBasic	$ 0.91us-gaap_EarningsPerShareBasic	$ 0.74us-gaap_EarningsPerShareBasic
Diluted earnings per common share	$ 0.98us-gaap_EarningsPerShareDiluted	$ 0.91us-gaap_EarningsPerShareDiluted	$ 0.74us-gaap_EarningsPerShareDiluted
Cash dividends declared per common share	$ 0.400	$ 0.385	$ 0.340

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Software licenses and maintenance.

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