v3.26.3
Revenue Recognition - Summary of Non Interest Income, Segregated by Revenue Streams in-Scope and Out-of-Scope of Topic 606 (Detail) - USD ($)
$ in Thousands
 3 Months Ended 9 Months Ended
Sep. 30, 2026
Sep. 30, 2025
Sep. 30, 2026
Sep. 30, 2025
Noninterest income:        
Loss on sale of AFS securities $ 0 $ (8,185) $ 0 $ (8,185)
Gain on OREO, net (134) 0 (134) 2,183
Other 2,451 8,506 7,757 12,965
Total noninterest income 16,494 13,006 47,783 43,978
Service Charges on Deposit Accounts [Member]        
Noninterest income:        
Revenue from contract with customer 5,562 4,859 15,715 14,726
Trust and Investment Services [Member]        
Noninterest income:        
Revenue from contract with customer 3,825 3,875 11,733 11,002
Bankcard Services [Member]        
Noninterest income:        
Revenue from contract with customer 718 684 2,009 1,961
Accounting Standard Update 2014-09 [Member]        
Noninterest income:        
Loss on sale of AFS securities   (8,185)   (8,185)
Gain on OREO, net (134) 0 (134) 2,183
Other 2,451 8,506 7,757 12,965
Total noninterest income 12,422 9,739 37,080 34,652
Accounting Standard Update 2014-09 [Member] | Service Charges on Deposit Accounts [Member]        
Noninterest income:        
Revenue from contract with customer 5,562 4,859 15,715 14,726
Accounting Standard Update 2014-09 [Member] | Trust and Investment Services [Member]        
Noninterest income:        
Revenue from contract with customer 3,825 3,875 11,733 11,002
Accounting Standard Update 2014-09 [Member] | Bankcard Services [Member]        
Noninterest income:        
Revenue from contract with customer 718 684 2,009 1,961
Accounting Standards Update 2014-09 Not Adopted [Member]        
Noninterest income:        
Total noninterest income $ 4,072 $ 3,267 $ 10,703 $ 9,326