Non-interest Income and Expense - Components of Non-Interest Income (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Schedule Of Other Noninterest Income And Expense [Line Items]
Total service charges and fees	$ 13,044	$ 10,930	$ 24,740	$ 21,406
Increase in cash value of life insurance	752	745	1,390	1,418
Asset management and commission income	1,039	947	1,926	1,781
Gain on sale of loans	542	2,847	1,788	6,094
Lease brokerage income	238	249	396	359
Sale of customer checks	441	116	545	235
Gain on sale of investment securities	0	0	0	0
(Loss) gain on marketable equity securities	(94)	8	(231)	(45)
Other	468	115	972	819
Total other non-interest income	3,386	5,027	6,786	10,661
Total non-interest income	16,430	15,957	31,526	32,067
ATM and interchange fees
Schedule Of Other Noninterest Income And Expense [Line Items]
Total service charges and fees	6,984	6,558	13,227	12,419
Service charges on deposit accounts
Schedule Of Other Noninterest Income And Expense [Line Items]
Total service charges and fees	4,163	3,462	7,997	6,731
Other service fees
Schedule Of Other Noninterest Income And Expense [Line Items]
Total service charges and fees	1,279	914	2,161	1,785
Mortgage banking service fees
Schedule Of Other Noninterest Income And Expense [Line Items]
Total service charges and fees	482	467	945	930
Change in value of mortgage servicing rights
Schedule Of Other Noninterest Income And Expense [Line Items]
Total service charges and fees	$ 136	$ (471)	$ 410	$ (459)