Non-interest Income and Expense - Components of Non-Interest Income (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Schedule Of Other Noninterest Income And Expense [Line Items]
Total service charges and fees	$ 12,968	$ 13,044	$ 24,165	$ 24,740
Increase in cash value of life insurance	788	752	1,590	1,390
Asset management and commission income	1,158	1,039	2,092	1,926
Gain on sale of loans	295	542	501	1,788
Lease brokerage income	74	238	172	396
Sale of customer checks	407	441	695	545
Loss on sale of investment securities	0	0	(164)	0
(Loss) gain on marketable equity securities	(42)	(94)	0	(231)
Other	93	468	325	972
Total other non-interest income	2,773	3,386	5,211	6,786
Total non-interest income	15,741	16,430	29,376	31,526
ATM and interchange fees
Schedule Of Other Noninterest Income And Expense [Line Items]
Total service charges and fees	6,856	6,984	13,200	13,227
Service charges on deposit accounts
Schedule Of Other Noninterest Income And Expense [Line Items]
Total service charges and fees	4,581	4,163	8,012	7,997
Other service fees
Schedule Of Other Noninterest Income And Expense [Line Items]
Total service charges and fees	992	1,279	2,158	2,161
Mortgage banking service fees
Schedule Of Other Noninterest Income And Expense [Line Items]
Total service charges and fees	454	482	919	945
Change in value of mortgage servicing rights
Schedule Of Other Noninterest Income And Expense [Line Items]
Total service charges and fees	$ 85	$ 136	$ (124)	$ 410