Non-interest Income and Expense - Components of Non-Interest Income (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Schedule Of Other Noninterest Income And Expense [Line Items]
Total service charges and fees	$ 11,696	$ 10,476
Increase in cash value of life insurance	638	673
Asset management and commission income	887	834
Gain on sale of loans	1,246	3,247
Lease brokerage income	158	110
Sale of customer checks	104	119
Gain on sale of investment securities	0	0
Loss on marketable equity securities	(137)	(53)
Other	504	704
Total other non-interest income	3,400	5,634
Total non-interest income	15,096	16,110
ATM and interchange fees
Schedule Of Other Noninterest Income And Expense [Line Items]
Total service charges and fees	6,243	5,861
Service charges on deposit accounts
Schedule Of Other Noninterest Income And Expense [Line Items]
Total service charges and fees	3,834	3,269
Other service fees
Schedule Of Other Noninterest Income And Expense [Line Items]
Total service charges and fees	882	871
Mortgage banking service fees
Schedule Of Other Noninterest Income And Expense [Line Items]
Total service charges and fees	463	463
Change in value of mortgage servicing rights
Schedule Of Other Noninterest Income And Expense [Line Items]
Total service charges and fees	$ 274	$ 12