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Junior Subordinated Debentures - Additional Information (Detail) (USD $) |  | 12 Months Ended |  |  | 12 Months Ended |
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Dec. 31, 2012 CVB Statutory Trust II [Member] | Dec. 31, 2012 CVB Statutory Trust II [Member] Junior Subordinated Debenture Held by CVB Statutory Trust II [Member] | Dec. 31, 2009 CVB Statutory Trust II [Member] Junior Subordinated Debenture Held by CVB Statutory Trust II [Member] | Jan. 31, 2009 CVB Statutory Trust II [Member] Junior Subordinated Debenture Held by CVB Statutory Trust II [Member] | Dec. 15, 2003 CVB Statutory Trust II [Member] Junior Subordinated Debenture Held by CVB Statutory Trust II [Member] | Dec. 31, 2012 CVB Statutory Trust III [Member] Junior Subordinated Debenture Held by CVB Statutory Trust III [Member] | Dec. 31, 2006 CVB Statutory Trust III [Member] Junior Subordinated Debenture Held by CVB Statutory Trust III [Member] | Jan. 31, 2006 CVB Statutory Trust III [Member] Junior Subordinated Debenture Held by CVB Statutory Trust III [Member]
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Trust Preferred Securities, Offered fair value | $ 20,619,000 |  |  |  | $ 40,000,000 |  |  | $ 25,000,000
Proceeds from the offering and other cash |  |  |  |  | $ 41,238,000 |  |  | $ 25,774,000
Maximum Period of Deferred payments of interest |  | 20 consecutive quarters |  |  |  | 20 consecutive quarters |  |
Trust preferred securities, maturity date |  | Jan. 07, 2034 |  |  |  | Mar. 15, 2036 |  |
Trust Preferred Securities, fixed interest rate during first five years |  | 6.46% |  |  |  |  |  |
Trust Preferred Securities, interest rate in excess of LIBOR |  |  | 2.85% |  |  |  | 1.38% |
Period of LIBOR |  |  |  | 3 months |  |  |  | 1 year
Trust Preferred Securities callable date |  | Jan. 07, 2009 |  |  |  | Mar. 15, 2011 |  |

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- Definition Investment basis spread on variable rate. + References No definition available. + Details
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Balance Type: | na
Period Type: | duration

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- Definition Maximum period of deferred payments of interest. + References No definition available. + Details
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- Definition Period during in which interest rate changed to inter bank offering floating rate. + References No definition available. + Details
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Namespace Prefix: | cvbf_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | instant

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- Definition Proceeds from offering of trust preferred securities and other cash. + References No definition available. + Details
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Namespace Prefix: | cvbf_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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- Definition Trust preferred securities callable date. + References No definition available. + Details
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Balance Type: | na
Period Type: | duration

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- Definition Trust Preferred Securities, Fixed interest rate during first five years. + References No definition available. + Details
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Data Type: | num:percentItemType
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- Definition Trust preferred securities issuance. + References No definition available. + Details
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Balance Type: | credit
Period Type: | instant

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- Definition The maturity date of the investment. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Article 12 -Section 12 -Sentence Column A + Details
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- Details
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