Revenue Recognition - Summary of Company's Source of Non-interest Income (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Non-interest income
Increase in bank-owned life insurance	$ 4,966	$ 4,059	$ 3,113
Net gain on acquisition and branch sales	2,131		962
Net gain (loss) from securities transactions	220	(51,909)	5
Other non-interest income
Total non-interest income	38,822	(19,129)	35,957
Service Charges and Fees [Member]
Non-interest income
Non-interest income	9,830	10,187	10,632
Other non-interest income
Non-interest income	9,830	10,187	10,632
Debit Card Income [Member]
Non-interest income
Non-interest income	10,246	10,322	10,677
Other non-interest income
Non-interest income	10,246	10,322	10,677
Mortgage Banking [Member]
Non-interest income
Non-interest income	861	652	1,416
Other non-interest income
Non-interest income	861	652	1,416
Accounting Standards Update 2014-09 [Member]
Non-interest income
Increase in bank-owned life insurance	4,966	4,059	3,113
Net gain on acquisition and branch sales	2,131		962
Net gain (loss) from securities transactions	220	(51,909)	5
Other non-interest income
Recovery on zero-basis purchased loans	4,380	517	249
Income (loss) from equity method investments	(87)	(222)	(222)
Other non-interest income not related to loans and deposits	(488)	123	90
Total other non-interest income	10,568	7,560	9,152
Total non-interest income	38,822	(19,129)	35,957
Accounting Standards Update 2014-09 [Member] | Service Charges and Fees [Member]
Non-interest income
Non-interest income	9,830	10,187	10,632
Other non-interest income
Non-interest income	9,830	10,187	10,632
Accounting Standards Update 2014-09 [Member] | Debit Card Income [Member]
Non-interest income
Non-interest income	10,246	10,322	10,677
Other non-interest income
Non-interest income	10,246	10,322	10,677
Accounting Standards Update 2014-09 [Member] | Mortgage Banking [Member]
Non-interest income
Non-interest income	861	652	1,416
Accounting Standards Update 2014-09 [Member] | Investment Referral Income [Member]
Non-interest income
Non-interest income	500	424	539
Other non-interest income
Non-interest income	500	424	539
Accounting Standards Update 2014-09 [Member] | Trust Income [Member]
Non-interest income
Non-interest income	1,624	1,123	1,036
Other non-interest income
Non-interest income	1,624	1,123	1,036
Accounting Standards Update 2014-09 [Member] | Insurance Sales Commissions [Member]
Non-interest income
Non-interest income	555	582	566
Other non-interest income
Non-interest income	555	582	566
Accounting Standards Update 2014-09 [Member] | Other Non Interest Income Related To Loans and Deposits [Member]
Non-interest income
Non-interest income	4,084	5,013	6,894
Other non-interest income
Non-interest income	$ 4,084	$ 5,013	$ 6,894