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Fair Value - Summary of Assets Measured at Fair Value on Nonrecurring Basis (Detail) - USD ($)
$ in Thousands
Sep. 30, 2023
Dec. 31, 2022
Disclosure Of Other Real Estate Owned Measured At Fair Value On A Recurring And Nonrecurring Basis Table [Line Items]    
Other equity investments $ 22,061 $ 23,776 [1]
Loans held for sale 69,640 69,534 [1]
OREO 0 195 [1]
Level 2 [Member]    
Disclosure Of Other Real Estate Owned Measured At Fair Value On A Recurring And Nonrecurring Basis Table [Line Items]    
Other equity investments 22,061 23,776
Fair Value, Nonrecurring [Member]    
Disclosure Of Other Real Estate Owned Measured At Fair Value On A Recurring And Nonrecurring Basis Table [Line Items]    
Other equity investments 22,061 23,776
Collateral dependent loans 68,612  
Impaired loans - Pre-ASC 326   54,906
Loans held for sale 69,640 69,534
OREO   195
Fair Value, Nonrecurring [Member] | Level 2 [Member]    
Disclosure Of Other Real Estate Owned Measured At Fair Value On A Recurring And Nonrecurring Basis Table [Line Items]    
Other equity investments 22,061 23,776
Loans held for sale 69,640 69,534
Fair Value, Nonrecurring [Member] | Level 3 [Member]    
Disclosure Of Other Real Estate Owned Measured At Fair Value On A Recurring And Nonrecurring Basis Table [Line Items]    
Collateral dependent loans $ 68,612  
Impaired loans - Pre-ASC 326   54,906
OREO   $ 195
[1] Derived from audited December 31, 2022 Consolidated Financial Statements.