Consolidated Statements of Cash Flows (USD $) In Thousands, unless otherwise specified	12 Months Ended
Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
CASH FLOWS FROM OPERATING ACTIVITIES
Interest and dividends received	$ 263,878	$ 244,205	$ 264,482
Service charges and other fees received	34,527us-gaap_ProceedsFromFeesReceived	30,494us-gaap_ProceedsFromFeesReceived	36,399us-gaap_ProceedsFromFeesReceived
Interest paid	(16,067)us-gaap_InterestPaid	(16,616)us-gaap_InterestPaid	(27,034)us-gaap_InterestPaid
Net cash paid to vendors and employees	(134,913)us-gaap_PaymentsToSuppliersAndEmployees	(93,076)us-gaap_PaymentsToSuppliersAndEmployees	(130,605)us-gaap_PaymentsToSuppliersAndEmployees
Income taxes paid	(58,589)us-gaap_IncomeTaxesPaid	(53,200)us-gaap_IncomeTaxesPaid	(7,455)us-gaap_IncomeTaxesPaid
(Payments to) proceeds from FDIC loss share agreement	(1,134)	4	18,974
Net cash provided by operating activities	87,702	111,811	154,761
CASH FLOWS FROM INVESTING ACTIVITIES
Proceeds from redemption of FHLB stock	10,413	24,320	16,038
Proceeds from maturity of interest-earning balances from depository institutions	63,687	0	0
Purchases of interest-earning balances from depository institutions	(10,000)	0	0
Proceeds from sale of investment securities	0	99,155	0
Proceeds from repayment of investment securities	349,473	414,881	559,187
Proceeds from maturity of investment securities	75,916	80,546	84,345
Purchases of investment securities	(805,544)us-gaap_PaymentsToAcquireInvestments	(920,657)us-gaap_PaymentsToAcquireInvestments	(942,710)us-gaap_PaymentsToAcquireInvestments
Net (increase) decrease in loan and lease finance receivables	(16,767)	(87,276)	48,001
Proceeds from sale of loans	9,668	0	0
Proceeds from sales of premises and equipment	663	25	27
Purchase of premises and equipment	(1,893)	(2,421)	(4,271)
Proceeds from sales of other real estate owned	5,825	12,971	18,295
Cash acquired on purchase of American Security Bank, net of cash paid	50,038us-gaap_CashAcquiredFromAcquisition	0us-gaap_CashAcquiredFromAcquisition	0us-gaap_CashAcquiredFromAcquisition
Net cash used in investing activities	(268,521)	(378,456)	(221,088)
CASH FLOWS FROM FINANCING ACTIVITIES
Net increase in transaction deposits	291,005us-gaap_IncreaseDecreaseInOtherDeposits	149,271us-gaap_IncreaseDecreaseInOtherDeposits	292,422us-gaap_IncreaseDecreaseInOtherDeposits
Net increase (decrease) in time deposits	44,647us-gaap_IncreaseDecreaseInTimeDeposits	(32,627)us-gaap_IncreaseDecreaseInTimeDeposits	(122,983)us-gaap_IncreaseDecreaseInTimeDeposits
Repayment of FHLB advances	0	0	(250,000)
Repayment of junior subordinated debentures	0us-gaap_RepaymentsOfSubordinatedDebt	(41,238)us-gaap_RepaymentsOfSubordinatedDebt	(48,043)us-gaap_RepaymentsOfSubordinatedDebt
Net (decrease) increase in other borrowings	23,000	43,000	26,000
Net (decrease) increase in customer repurchase agreements	(79,624)	170,007	(36,126)
Cash dividends on common stock	(42,298)us-gaap_PaymentsOfDividendsCommonStock	(29,939)us-gaap_PaymentsOfDividendsCommonStock	(44,552)us-gaap_PaymentsOfDividendsCommonStock
Repurchase of common stock	(5,474)	(559)	(54)
Proceeds from exercise of stock options	5,522	4,517	2,557
Tax benefit related to exercise of stock options	1,116	475	194
Net cash provided by (used in) financing activities	191,894	262,907	(180,585)
NET INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS	11,075	(3,738)	(246,912)
CASH AND CASH EQUIVALENTS, beginning of period	94,693	98,431	345,343
CASH AND CASH EQUIVALENTS, end of period	105,768	94,693	98,431
RECONCILIATION OF NET EARNINGS TO NET CASH PROVIDED BY OPERATING ACTIVITIES
Net earnings	104,021us-gaap_NetIncomeLoss	95,608us-gaap_NetIncomeLoss	77,280us-gaap_NetIncomeLoss
Adjustments to reconcile net earnings to net cash provided by operating activities:
Gain on sale of loans held for sale	(6,001)us-gaap_GainLossOnSalesOfLoansNet	0us-gaap_GainLossOnSalesOfLoansNet	0us-gaap_GainLossOnSalesOfLoansNet
Gain on sale of investment securities	0us-gaap_GainLossOnSaleOfSecuritiesNet	(2,094)us-gaap_GainLossOnSaleOfSecuritiesNet	0us-gaap_GainLossOnSaleOfSecuritiesNet
Loss (gain) on sale of premises and equipment, net	66	(14)	70
Gain on sale of other real estate owned	(957)	(3,048)	(1,393)
Amortization of capitalized prepayment penalty on borrowings	273	272	272
Increase in bank owned life insurance	(2,314)	(2,435)	(3,612)
Net amortization of premiums and discounts on investment securities	21,020	27,064	24,082
Accretion of PCI discount	(5,825)	(12,856)	(22,607)
Provision for loan losses	(16,100)	(16,750)	0
Provision for unfunded loan commitments	(1,250)	500	(1,000)
Valuation adjustment on other real estate owned	65	489	1,047
Change in FDIC loss share asset	3,591	12,860	21,916
(Payments to) proceeds from FDIC loss share agreement	(1,134)	4	18,974
Stock-based compensation	2,988us-gaap_ShareBasedCompensation	1,926us-gaap_ShareBasedCompensation	2,039us-gaap_ShareBasedCompensation
Depreciation and amortization, net	559us-gaap_DepreciationAndAmortization	2,449us-gaap_DepreciationAndAmortization	7,532us-gaap_DepreciationAndAmortization
Change in accrued interest receivable	(419)	304	1,157
Change in accrued interest payable	5	(382)	(2,033)
Change in other assets and liabilities	(10,886)	7,914	31,037
Total adjustments	(16,319)	16,203	77,481
Net cash provided by operating activities	87,702	111,811	154,761
Net cash used in investing activities	(268,521)	(378,456)	(221,088)
Net cash provided by financing activities	191,894	262,907	(180,585)
NET INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS	11,075	(3,738)	(246,912)
SUPPLEMENTAL DISCLOSURE OF NONCASH INVESTING ACTIVITIES
Securities purchased and not settled	0cvbf_SecuritiesPurchasedAndNotSettled	3,533cvbf_SecuritiesPurchasedAndNotSettled	0cvbf_SecuritiesPurchasedAndNotSettled
Transfer of loans to other real estate owned	1,963us-gaap_TransferOfOtherRealEstate	1,492us-gaap_TransferOfOtherRealEstate	10,246us-gaap_TransferOfOtherRealEstate
Transfer of loans held for investment to loans held-for-sale	$ 0	$ 3,667	$ 0

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Securities purchased and not settled.

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Amount of gain (loss) on sale or disposal of property, plant and equipment assets, including oil and gas property and timber property.

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Amount of cash inflow (outflow) of financing activities, excluding discontinued operations. Financing activity cash flows include obtaining resources from owners and providing them with a return on, and a return of, their investment; borrowing money and repaying amounts borrowed, or settling the obligation; and obtaining and paying for other resources obtained from creditors on long-term credit.

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Amount of cash inflow (outflow) of investing activities, excluding discontinued operations. Investing activity cash flows include making and collecting loans and acquiring and disposing of debt or equity instruments and property, plant, and equipment and other productive assets.

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Amount of cash inflow (outflow) from operating activities, excluding discontinued operations. Operating activity cash flows include transactions, adjustments, and changes in value not defined as investing or financing activities.

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The portion of profit or loss for the period, net of income taxes, which is attributable to the parent.

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Amount of cash outflow (inflow) from acquisition (sale) of Federal Home Loan Bank (FHLBank) stock.

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The cash outflow to reacquire common stock during the period.

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Amount of cash outflow in the form of ordinary dividends to common shareholders of the parent entity.

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Cash payments to suppliers for goods and services provided and to employees for services provided.

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Cash received for fees during the current period. This element excludes cash proceeds from license fees.

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Cash received for dividends and interest on the entity's equity and debt investments during the current period.

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The cash inflow associated with maturities (principal being due), prepayments and calls (requests of early payments) on securities not classified as either held-to-maturity securities or trading securities which are classified as available-for-sale securities.

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The cash flow from investments sold under the agreement to repurchase such investment.

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The net cash inflow or outflow in other borrowings not otherwise defined in the taxonomy.

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The cash inflow associated with the sale and maturity (principal being due) of other investments, prepayment and call (request of early payment) of other investments not otherwise defined in the taxonomy.

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The cash inflow associated with the sale, maturity and collection of all investments such as debt, security and so forth during the period.

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The cash inflow associated with the sale of debt and equity securities classified as available-for-sale securities.

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The net cash inflow from (a) sales of loans held-for-investment, (b) sales of leases held-for-investment, and (c) both. Includes proceeds from securitizations of loans.

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The cash inflow associated with the sale of other real estate not otherwise defined in the taxonomy.

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The cash inflow from the sale of long-lived, physical assets that are used in the normal conduct of business to produce goods and services and not intended for resale.

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The cash inflow associated with the amount received from holders exercising their stock options. This item inherently excludes any excess tax benefit, which the entity may have realized and reported separately.

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The cash outflow for the payment of loan drawn from Federal Home Loan.

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The cash outflow from the repayment of long-term borrowing where a lender is placed in a lien position behind debt having a higher priority of repayment (senior) in case of liquidation of the entity's assets or underlying collateral.

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The aggregate amount of noncash, equity-based employee remuneration. This may include the value of stock or unit options, amortization of restricted stock or units, and adjustment for officers' compensation. As noncash, this element is an add back when calculating net cash generated by operating activities using the indirect method.

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Value transferred out of real estate owned (REO) in noncash transactions.

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Value of loans and leases held in the entity's portfolio transferred to loans and leases held-for-sale in noncash transactions.

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