Revenue from Contracts with Customers - Disaggregation of Revenue (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Revenue from Contracts with Customers
Net interest income	$ 613,549	$ 530,559	$ 535,734
Not in scope of Topic 606	11,693	25,149	48,106
Total noninterest income	179,525	184,916	197,380
Total revenue	793,074	715,475	733,114
Retail Banking
Revenue from Contracts with Customers
Net interest income	436,228	385,656	375,145
Not in scope of Topic 606	6,199	8,270	16,264
Total noninterest income	94,085	91,672	98,026
Total revenue	530,313	477,328	473,171
Commercial Banking
Revenue from Contracts with Customers
Net interest income	157,128	162,997	151,622
Not in scope of Topic 606	6,709	6,491	19,945
Total noninterest income	77,539	72,781	78,202
Total revenue	234,667	235,778	229,824
Treasury and Other
Revenue from Contracts with Customers
Net interest income	20,193	(18,094)	8,967
Not in scope of Topic 606	(1,215)	10,388	11,897
Total noninterest income	7,901	20,463	21,152
Total revenue	28,094	2,369	30,119
Service charges on deposit accounts.
Revenue from Contracts with Customers
Revenue by type of service	28,809	27,510	28,169
Service charges on deposit accounts. | Retail Banking
Revenue from Contracts with Customers
Revenue by type of service	25,871	24,413	25,326
Service charges on deposit accounts. | Commercial Banking
Revenue from Contracts with Customers
Revenue by type of service	1,972	1,225	1,305
Service charges on deposit accounts. | Treasury and Other
Revenue from Contracts with Customers
Revenue by type of service	966	1,872	1,538
Credit and debit card fees
Revenue from Contracts with Customers
Revenue by type of service	63,633	61,143	53,372
Credit and debit card fees | Commercial Banking
Revenue from Contracts with Customers
Revenue by type of service	58,659	55,728	48,999
Credit and debit card fees | Treasury and Other
Revenue from Contracts with Customers
Revenue by type of service	4,974	5,415	4,373
Other service charges and fees.
Revenue from Contracts with Customers
Revenue by type of service	29,193	29,058	23,167
Other service charges and fees. | Retail Banking
Revenue from Contracts with Customers
Revenue by type of service	25,062	23,917	20,084
Other service charges and fees. | Commercial Banking
Revenue from Contracts with Customers
Revenue by type of service	2,243	3,547	1,550
Other service charges and fees. | Treasury and Other
Revenue from Contracts with Customers
Revenue by type of service	1,888	1,594	1,533
Trust and investment services income
Revenue from Contracts with Customers
Revenue by type of service	36,465	34,719	35,652
Trust and investment services income | Retail Banking
Revenue from Contracts with Customers
Revenue by type of service	36,465	34,719	35,652
Other.
Revenue from Contracts with Customers
Revenue by type of service	9,732	7,337	8,914
Other. | Retail Banking
Revenue from Contracts with Customers
Revenue by type of service	488	353	700
Other. | Commercial Banking
Revenue from Contracts with Customers
Revenue by type of service	7,956	5,790	6,403
Other. | Treasury and Other
Revenue from Contracts with Customers
Revenue by type of service	$ 1,288	$ 1,194	$ 1,811