Revenue from Contracts with Customers - Disaggregation of Revenue (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Revenue from Contracts with Customers
Net interest income	$ 167,247	$ 133,872
Not in scope of Topic 606	6,159	71
Total noninterest income	49,023	41,380
Total revenue	216,270	175,252
Retail Banking
Revenue from Contracts with Customers
Net interest income	108,920	94,048
Not in scope of Topic 606	1,702	1,091
Total noninterest income	24,267	23,315
Total revenue	133,187	117,363
Commercial Banking
Revenue from Contracts with Customers
Net interest income	40,939	35,088
Not in scope of Topic 606	1,111	1,918
Total noninterest income	17,888	18,655
Total revenue	58,827	53,743
Treasury and Other
Revenue from Contracts with Customers
Net interest income	17,388	4,736
Not in scope of Topic 606	3,346	(2,938)
Total noninterest income	6,868	(590)
Total revenue	24,256	4,146
Service charges on deposit accounts.
Revenue from Contracts with Customers
Revenue by type of service	7,231	7,501
Service charges on deposit accounts. | Retail Banking
Revenue from Contracts with Customers
Revenue by type of service	6,541	6,650
Service charges on deposit accounts. | Commercial Banking
Revenue from Contracts with Customers
Revenue by type of service	626	346
Service charges on deposit accounts. | Treasury and Other
Revenue from Contracts with Customers
Revenue by type of service	64	505
Credit and debit card fees
Revenue from Contracts with Customers
Revenue by type of service	15,710	14,242
Credit and debit card fees | Commercial Banking
Revenue from Contracts with Customers
Revenue by type of service	14,414	13,026
Credit and debit card fees | Treasury and Other
Revenue from Contracts with Customers
Revenue by type of service	1,296	1,216
Other service charges and fees.
Revenue from Contracts with Customers
Revenue by type of service	7,104	7,713
Other service charges and fees. | Retail Banking
Revenue from Contracts with Customers
Revenue by type of service	6,171	6,563
Other service charges and fees. | Commercial Banking
Revenue from Contracts with Customers
Revenue by type of service	420	781
Other service charges and fees. | Treasury and Other
Revenue from Contracts with Customers
Revenue by type of service	513	369
Trust and investment services income
Revenue from Contracts with Customers
Revenue by type of service	9,614	8,883
Trust and investment services income | Retail Banking
Revenue from Contracts with Customers
Revenue by type of service	9,614	8,883
Other.
Revenue from Contracts with Customers
Revenue by type of service	3,205	2,970
Other. | Retail Banking
Revenue from Contracts with Customers
Revenue by type of service	239	128
Other. | Commercial Banking
Revenue from Contracts with Customers
Revenue by type of service	1,317	2,584
Other. | Treasury and Other
Revenue from Contracts with Customers
Revenue by type of service	$ 1,649	$ 258