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Acquired SJB Assets and FDIC Loss Sharing Asset - Summary of PCI Loans by Internal Risk Ratings (Detail) (PCI Loans [Member], USD $) In Thousands, unless otherwise specified | Mar. 31, 2015 | Dec. 31, 2014
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Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total PCI gross loans | $ 121,030 cvbf_GrossPurchasedCreditImpairedLoans | $ 133,496 cvbf_GrossPurchasedCreditImpairedLoans
Pass [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total PCI gross loans | 25,483 cvbf_GrossPurchasedCreditImpairedLoans / us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis = cvbf_PurchasedCreditImpairedLoansMember / us-gaap_InternalCreditAssessmentAxis = us-gaap_PassMember | 26,706 cvbf_GrossPurchasedCreditImpairedLoans / us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis = cvbf_PurchasedCreditImpairedLoansMember / us-gaap_InternalCreditAssessmentAxis = us-gaap_PassMember
Watch List [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total PCI gross loans | 69,635 cvbf_GrossPurchasedCreditImpairedLoans / us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis = cvbf_PurchasedCreditImpairedLoansMember / us-gaap_InternalCreditAssessmentAxis = cvbf_WatchListMember | 77,371 cvbf_GrossPurchasedCreditImpairedLoans / us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis = cvbf_PurchasedCreditImpairedLoansMember / us-gaap_InternalCreditAssessmentAxis = cvbf_WatchListMember
Special Mention [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total PCI gross loans | 7,148 cvbf_GrossPurchasedCreditImpairedLoans / us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis = cvbf_PurchasedCreditImpairedLoansMember / us-gaap_InternalCreditAssessmentAxis = us-gaap_SpecialMentionMember | 8,203 cvbf_GrossPurchasedCreditImpairedLoans / us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis = cvbf_PurchasedCreditImpairedLoansMember / us-gaap_InternalCreditAssessmentAxis = us-gaap_SpecialMentionMember
Substandard [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total PCI gross loans | 18,764 cvbf_GrossPurchasedCreditImpairedLoans / us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis = cvbf_PurchasedCreditImpairedLoansMember / us-gaap_InternalCreditAssessmentAxis = us-gaap_SubstandardMember | 21,216 cvbf_GrossPurchasedCreditImpairedLoans / us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis = cvbf_PurchasedCreditImpairedLoansMember / us-gaap_InternalCreditAssessmentAxis = us-gaap_SubstandardMember
Doubtful & Loss [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total PCI gross loans | $ 0 cvbf_GrossPurchasedCreditImpairedLoans / us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis = cvbf_PurchasedCreditImpairedLoansMember / us-gaap_InternalCreditAssessmentAxis = us-gaap_DoubtfulMember | $ 0 cvbf_GrossPurchasedCreditImpairedLoans / us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis = cvbf_PurchasedCreditImpairedLoansMember / us-gaap_InternalCreditAssessmentAxis = us-gaap_DoubtfulMember

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