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Allowance for Credit Losses, Credit Quality and Other - Schedule of Allowance for Credit Losses (Detail) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Beginning balance $ 289,669 $ 236,714 $ 245,473
Allowance for credit losses on PCD loans   16,816  
Loans charged off (16,055) (17,267) (11,661)
Recoveries of loans previously charged off 2,670 3,236 2,902
Net loans recovered (charged off) (13,385) (14,031) (8,759)
Provision for credit loss - acquired loans   45,170  
Provision for credit loss - loans 11,950 5,000 0
Ending balance 288,234 289,669 236,714
Residential Real Estate      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Beginning balance 50,963 48,458 53,216
Allowance for credit losses on PCD loans   980  
Loans charged off (269) (446) (545)
Recoveries of loans previously charged off 329 119 683
Net loans recovered (charged off) 60 (327) 138
Provision for credit loss - acquired loans   7,380  
Provision for credit loss - loans 4,837 (5,528) (4,896)
Ending balance 55,860 50,963 48,458
Commercial & Industrial      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Beginning balance 89,354 53,062 46,530
Allowance for credit losses on PCD loans   5,596  
Loans charged off (9,157) (9,773) (8,242)
Recoveries of loans previously charged off 583 780 591
Net loans recovered (charged off) (8,574) (8,993) (7,651)
Provision for credit loss - acquired loans   11,303  
Provision for credit loss - loans 12,030 28,386 14,183
Ending balance 92,810 89,354 53,062
Consumer & Other      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Beginning balance 23,261 19,561 24,413
Allowance for credit losses on PCD loans   7  
Loans charged off (4,031) (7,047) (2,228)
Recoveries of loans previously charged off 1,112 965 785
Net loans recovered (charged off) (2,919) (6,082) (1,443)
Provision for credit loss - acquired loans   571  
Provision for credit loss - loans 6,710 9,204 (3,409)
Ending balance 27,052 23,261 19,561
Construction/ Land Development | Commercial real estate loans      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Beginning balance 32,243 28,415 32,861
Allowance for credit losses on PCD loans   950  
Loans charged off (263) (1) 0
Recoveries of loans previously charged off 113 405 58
Net loans recovered (charged off) (150) 404 58
Provision for credit loss - acquired loans   7,205  
Provision for credit loss - loans 1,784 (4,731) (4,504)
Ending balance 33,877 32,243 28,415
Other Commercial Real Estate | Commercial real estate loans      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Beginning balance 93,848 87,218 88,453
Allowance for credit losses on PCD loans   9,283  
Loans charged off (2,335) 0 (646)
Recoveries of loans previously charged off 533 967 785
Net loans recovered (charged off) (1,802) 967 139
Provision for credit loss - acquired loans   18,711  
Provision for credit loss - loans (13,411) (22,331) (1,374)
Ending balance $ 78,635 $ 93,848 $ 87,218