Revenue from Contracts with Customers (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Disaggregation of Revenue [Line Items]
Revenue from contract with customer	$ 61,489	$ 70,594	$ 121,204	$ 135,725
Non-interest income	89,374	120,933	160,140	224,968
Deposit service fees
Disaggregation of Revenue [Line Items]
Revenue from contract with customer	45,418	51,385	90,854	99,212
Loan and lease related fees
Disaggregation of Revenue [Line Items]
Revenue from contract with customer	4,323	6,077	8,750	10,575
Wealth and investment services
Disaggregation of Revenue [Line Items]
Revenue from contract with customer	7,391	11,244	13,978	21,841
Other non interest income
Disaggregation of Revenue [Line Items]
Revenue from contract with customer	4,357	1,888	7,622	4,097
Non-interest income within the scope of other GAAP topics
Disaggregation of Revenue [Line Items]
Revenue from contract with customer	27,885
Non-interest income		50,339	38,936	89,243
Operating Segments | Commercial Banking
Disaggregation of Revenue [Line Items]
Revenue from contract with customer	12,778	16,494	25,362	30,811
Non-interest income	32,255	49,430	67,652	88,173
Operating Segments | Commercial Banking | Deposit service fees
Disaggregation of Revenue [Line Items]
Revenue from contract with customer	5,582	7,647	10,972	14,332
Operating Segments | Commercial Banking | Loan and lease related fees
Disaggregation of Revenue [Line Items]
Revenue from contract with customer	4,323	6,077	8,750	10,575
Operating Segments | Commercial Banking | Wealth and investment services
Disaggregation of Revenue [Line Items]
Revenue from contract with customer	2,873	2,770	5,640	5,904
Operating Segments | Commercial Banking | Other non interest income
Disaggregation of Revenue [Line Items]
Revenue from contract with customer	0	0	0	0
Operating Segments | Commercial Banking | Non-interest income within the scope of other GAAP topics
Disaggregation of Revenue [Line Items]
Revenue from contract with customer	19,477
Non-interest income		32,936	42,290	57,362
Operating Segments | HSA Bank
Disaggregation of Revenue [Line Items]
Revenue from contract with customer	23,023	26,552	47,090	53,510
Non-interest income	23,023	26,552	47,090	53,510
Operating Segments | HSA Bank | Deposit service fees
Disaggregation of Revenue [Line Items]
Revenue from contract with customer	20,986	24,949	43,078	50,083
Operating Segments | HSA Bank | Loan and lease related fees
Disaggregation of Revenue [Line Items]
Revenue from contract with customer	0	0	0	0
Operating Segments | HSA Bank | Wealth and investment services
Disaggregation of Revenue [Line Items]
Revenue from contract with customer	0	0	0	0
Operating Segments | HSA Bank | Other non interest income
Disaggregation of Revenue [Line Items]
Revenue from contract with customer	2,037	1,603	4,012	3,427
Operating Segments | HSA Bank | Non-interest income within the scope of other GAAP topics
Disaggregation of Revenue [Line Items]
Revenue from contract with customer	0
Non-interest income		0	0	0
Operating Segments | Consumer Banking
Disaggregation of Revenue [Line Items]
Revenue from contract with customer	24,904	27,130	47,114	50,949
Non-interest income	28,877	30,798	54,836	58,699
Operating Segments | Consumer Banking | Deposit service fees
Disaggregation of Revenue [Line Items]
Revenue from contract with customer	19,181	18,366	37,205	34,329
Operating Segments | Consumer Banking | Loan and lease related fees
Disaggregation of Revenue [Line Items]
Revenue from contract with customer	0	0	0	0
Operating Segments | Consumer Banking | Wealth and investment services
Disaggregation of Revenue [Line Items]
Revenue from contract with customer	4,525	8,479	8,353	15,950
Operating Segments | Consumer Banking | Other non interest income
Disaggregation of Revenue [Line Items]
Revenue from contract with customer	1,198	285	1,556	670
Operating Segments | Consumer Banking | Non-interest income within the scope of other GAAP topics
Disaggregation of Revenue [Line Items]
Revenue from contract with customer	3,973
Non-interest income		3,668	7,722	7,750
Corporate, Non-Segment
Disaggregation of Revenue [Line Items]
Revenue from contract with customer	784	418	1,638	455
Non-interest income	5,219	14,153	(9,438)	24,586
Corporate, Non-Segment | Deposit service fees
Disaggregation of Revenue [Line Items]
Revenue from contract with customer	(331)	423	(401)	468
Corporate, Non-Segment | Loan and lease related fees
Disaggregation of Revenue [Line Items]
Revenue from contract with customer	0	0	0	0
Corporate, Non-Segment | Wealth and investment services
Disaggregation of Revenue [Line Items]
Revenue from contract with customer	(7)	(5)	(15)	(13)
Corporate, Non-Segment | Other non interest income
Disaggregation of Revenue [Line Items]
Revenue from contract with customer	1,122	0	2,054	0
Corporate, Non-Segment | Non-interest income within the scope of other GAAP topics
Disaggregation of Revenue [Line Items]
Revenue from contract with customer	$ 4,435
Non-interest income		$ 13,735	$ (11,076)	$ 24,131