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Borrowings - Additional Information (Detail) - USD ($)
 12 Months Ended
Jan. 31, 2006
Dec. 31, 2021
Dec. 31, 2020
Debt Instrument [Line Items]      
Funds borrowed under repurchase agreement   $ 642,388,000 $ 439,406,000
Weighted average interest rates   0.08% 0.10%
Loans at carrying value   $ 3,960,000,000 $ 6,070,000,000.00
Investment securities at carrying value   2,180,000,000 1,810,000,000
Period of LIBOR 1 year    
Short term borrowings   2,300,000 $ 5,000,000.0
Collateral Pledged [Member]      
Debt Instrument [Line Items]      
Investment securities at carrying value   $ 2,180,000,000  
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 $ 25,000,000    
Proceeds from the offering and other cash $ 25,774,000    
Maximum Period of Deferred payments of interest   20 consecutive quarters  
Trust Preferred Securities, maturity date   Mar. 15, 2036  
Trust Preferred Securities, interest rate in excess of LIBOR 1.38%    
Trust Preferred Securities callable date   Mar. 15, 2011