Parent Company Only Condensed Financial Information - Schedule of Condensed Balance Sheets (Detail) - USD ($) $ in Thousands	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
ASSETS
Equity securities	$ 2,421	$ 2,169
Other assets	27,004	26,266
Total assets	4,098,469	3,861,418
LIABILITIES
Subordinated debentures	104,089	103,943
Total liabilities	3,709,967	3,489,416
SHAREHOLDERS’ EQUITY
Common stock	312,037	311,166
Accumulated earnings	205,408	183,788
Treasury stock	(75,586)	(75,422)
Accumulated other comprehensive loss	(53,357)	(47,530)
Total shareholders’ equity	388,502	372,002	$ 334,835	$ 355,212
Total liabilities and shareholders’ equity	4,098,469	3,861,418
CBI[Member]
ASSETS
Cash	8,879	8,331	$ 21,812	$ 45,800
Equity securities	2,421	2,169
Investment in bank subsidiary	460,070	450,791
Investment in nonbank subsidiaries	4,041	3,917
Other assets	18,841	12,354
Total assets	494,252	477,562
LIABILITIES
Other liabilities	1,661	1,618
Subordinated debentures	104,089	103,943
Total liabilities	105,750	105,561
SHAREHOLDERS’ EQUITY
Common stock	312,037	311,166
Accumulated earnings	205,408	183,787
Treasury stock	(75,586)	(75,422)
Accumulated other comprehensive loss	(53,357)	(47,530)
Total shareholders’ equity	388,502	372,001
Total liabilities and shareholders’ equity	$ 494,252	$ 477,562