Condensed Financial Information - Parent Company Only - Condensed Statements of Operations (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Income
Other income (loss)	$ 979	$ 268	$ 735
Expense
Noninterest expenses	188,208	140,757	132,798
Income taxes benefit	36,623	32,294	17,259
Net Income	107,369	95,041	57,518
Parent Company
Income
Dividends from subsidiaries	52,988	50,648	29,961
Other income (loss)	79	34	(486)
Total Income	53,067	50,682	29,475
Expense
Interest on subordinated debentures	6,825	5,419	5,968
Noninterest expenses	542	1,498	549
Total Expense	7,367	6,917	6,517
Income before benefit for income taxes	45,700	43,765	22,958
Income taxes benefit	(1,530)	(1,445)	(1,645)
Income before equity in undistributed income of subsidiaries	47,230	45,210	24,603
Equity in undistributed income of subsidiaries	60,139	49,831	32,915
Net Income	$ 107,369	$ 95,041	$ 57,518