Parent Company Only Condensed Financial Information - Schedule of Condensed Statements of Cash Flows (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Operating activities:
Net income	$ 39,427	$ 40,546	$ 32,192
Adjustment to reconcile net income to net cash from operating activities:
Net cash from operating activities	25,183	40,761	32,654
Cash flows used for investing activities:
Acquisition and additional capitalization of subsidiary, net of cash acquired	(51,643)
Net cash used for investing activities	(410,364)	(130,496)	(340,982)
Cash flows from financing activities:
Net cash from financing activities	164,303	216,925	398,802
Increase (decrease) in cash and due from financial institutions	(220,878)	127,190	90,474
CBI[Member]
Operating activities:
Net income	39,427	40,546	32,192
Adjustment to reconcile net income to net cash from operating activities:
Change in other assets and other liabilities	4,587	2,495	1,925
Equity in undistributed net earnings of subsidiaries	(16,662)	(21,228)	(18,188)
Net cash from operating activities	27,352	21,813	15,929
Cash flows used for investing activities:
Disposal of minority interest		11,500
Acquisition and additional capitalization of subsidiary, net of cash acquired	(25,960)	(50,000)
Net cash used for investing activities	(25,960)	(38,500)
Cash flows from financing activities:
Proceeds from subordinated debenture, net of issuance costs		73,386
Purchase of treasury stock	(16,887)	(22,309)	(13,454)
Cash dividends paid	(8,493)	(8,036)	(7,118)
Net cash from financing activities	(25,380)	43,041	(20,572)
Increase (decrease) in cash and due from financial institutions	(23,988)	26,354	(4,643)
Cash and cash equivalents at beginning of year	45,800	19,446	24,089
Cash and cash equivalents at end of year	$ 21,812	$ 45,800	$ 19,446