Condensed Parent Company Financial Statements - Summary of Balance Sheet of Parent Company (Detail) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
ASSETS
Cash	$ 259,049	$ 228,819
Goodwill	182,055	149,922
Total assets	12,387,863	9,405,612	$ 9,212,357
LIABILITIES AND STOCKHOLDERS' EQUITY
Other liabilities	76,455	55,977
Subordinated debt	86,044	85,987
Stockholders’ equity	1,250,836	1,171,734	$ 1,067,885
Total liabilities and stockholders' equity	12,387,863	9,405,612
Parent Company [Member]
ASSETS
Cash	17,806	62,007
Investments in subsidiaries	1,206,246	1,117,622
Goodwill	101,611	69,478
Core deposit premium	12,009	7,627
Dividends receivable	15,682	13,426
Other assets	1,731	1,515
Total assets	1,355,085	1,271,675
LIABILITIES AND STOCKHOLDERS' EQUITY
Other liabilities	18,205	13,954
Subordinated debt	86,044	85,987
Stockholders’ equity	1,250,836	1,171,734
Total liabilities and stockholders' equity	$ 1,355,085	$ 1,271,675