Revenue from Contracts with Customers - Disaggregation of Revenue (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Revenue from Contracts with Customers
Net interest income (expense)	$ 152,851	$ 159,939	$ 307,278	$ 327,186
Not in scope of Topic 606	5,960	5,695	11,920	11,853
Total noninterest income	51,768	47,348	103,139	96,371
Total revenue	204,619	207,287	410,417	423,557
Retail Banking
Revenue from Contracts with Customers
Net interest income (expense)	124,696	104,237	252,753	213,157
Not in scope of Topic 606	2,065	1,754	3,914	3,455
Total noninterest income	26,296	23,797	52,331	48,064
Total revenue	150,992	128,034	305,084	261,221
Commercial Banking
Revenue from Contracts with Customers
Net interest income (expense)	45,019	41,496	90,400	82,435
Not in scope of Topic 606	1,556	1,827	2,553	2,939
Total noninterest income	18,623	19,086	36,581	36,974
Total revenue	63,642	60,582	126,981	119,409
Treasury and Other
Revenue from Contracts with Customers
Net interest income (expense)	(16,864)	14,206	(35,875)	31,594
Not in scope of Topic 606	2,339	2,114	5,453	5,459
Total noninterest income	6,849	4,465	14,227	11,333
Total revenue	(10,015)	18,671	(21,648)	42,927
Deposit Account [Member]
Revenue from Contracts with Customers
Revenue by type of service	7,793	7,246	15,339	14,477
Deposit Account [Member] | Retail Banking
Revenue from Contracts with Customers
Revenue by type of service	6,778	6,458	13,453	13,000
Deposit Account [Member] | Commercial Banking
Revenue from Contracts with Customers
Revenue by type of service	894	662	1,718	1,288
Deposit Account [Member] | Treasury and Other
Revenue from Contracts with Customers
Revenue by type of service	121	126	168	189
Credit and Debit Card [Member]
Revenue from Contracts with Customers
Revenue by type of service	15,290	14,878	30,887	30,589
Credit and Debit Card [Member] | Commercial Banking
Revenue from Contracts with Customers
Revenue by type of service	14,272	13,639	28,863	28,053
Credit and Debit Card [Member] | Treasury and Other
Revenue from Contracts with Customers
Revenue by type of service	1,018	1,239	2,024	2,536
Financial Service, Other [Member]
Revenue from Contracts with Customers
Revenue by type of service	8,873	7,023	16,778	14,127
Financial Service, Other [Member] | Retail Banking
Revenue from Contracts with Customers
Revenue by type of service	7,772	6,049	14,709	12,220
Financial Service, Other [Member] | Commercial Banking
Revenue from Contracts with Customers
Revenue by type of service	510	424	908	844
Financial Service, Other [Member] | Treasury and Other
Revenue from Contracts with Customers
Revenue by type of service	591	550	1,161	1,063
Fiduciary and Trust [Member]
Revenue from Contracts with Customers
Revenue by type of service	9,426	9,448	19,780	19,062
Fiduciary and Trust [Member] | Retail Banking
Revenue from Contracts with Customers
Revenue by type of service	9,426	9,448	19,780	19,062
Other.
Revenue from Contracts with Customers
Revenue by type of service	4,426	3,058	8,435	6,263
Other. | Retail Banking
Revenue from Contracts with Customers
Revenue by type of service	255	88	475	327
Other. | Commercial Banking
Revenue from Contracts with Customers
Revenue by type of service	1,391	2,534	2,539	3,850
Other. | Treasury and Other
Revenue from Contracts with Customers
Revenue by type of service	$ 2,780	$ 436	$ 5,421	$ 2,086