Revenue from Contracts with Customers (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Disaggregation of Revenue [Line Items]
Revenue from contract with customer	$ 70,594	$ 54,181	$ 135,725	$ 106,588
Non-interest income	120,933	72,702	224,968	149,459
Deposit service fees
Disaggregation of Revenue [Line Items]
Revenue from contract with customer	51,385	41,439	99,212	81,908
Loan and lease related fees
Disaggregation of Revenue [Line Items]
Revenue from contract with customer	6,077		10,575
Wealth and investment services
Disaggregation of Revenue [Line Items]
Revenue from contract with customer	11,244	10,087	21,841	19,490
Other non interest income
Disaggregation of Revenue [Line Items]
Revenue from contract with customer	1,888	2,655	4,097	5,190
Non-interest income within the scope of other GAAP topics
Disaggregation of Revenue [Line Items]
Revenue from contract with customer	50,339
Non-interest income		18,521	89,243	42,871
Operating Segments | Commercial Banking
Disaggregation of Revenue [Line Items]
Revenue from contract with customer	16,494	7,147	30,811	14,156
Non-interest income	49,430	18,378	88,173	36,754
Operating Segments | Commercial Banking | Deposit service fees
Disaggregation of Revenue [Line Items]
Revenue from contract with customer	7,647	4,104	14,332	8,194
Operating Segments | Commercial Banking | Loan and lease related fees
Disaggregation of Revenue [Line Items]
Revenue from contract with customer	6,077		10,575
Operating Segments | Commercial Banking | Wealth and investment services
Disaggregation of Revenue [Line Items]
Revenue from contract with customer	2,770	3,043	5,904	5,962
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	32,936
Non-interest income		11,231	57,362	22,598
Operating Segments | HSA Bank
Disaggregation of Revenue [Line Items]
Revenue from contract with customer	26,552	26,554	53,510	53,559
Non-interest income	26,552	26,554	53,510	53,559
Operating Segments | HSA Bank | Deposit service fees
Disaggregation of Revenue [Line Items]
Revenue from contract with customer	24,949	24,478	50,083	49,496
Operating Segments | HSA Bank | Loan and lease related fees
Disaggregation of Revenue [Line Items]
Revenue from contract with customer	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	1,603	2,076	3,427	4,063
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	27,116	20,366	50,926	38,721
Non-interest income	30,784	24,098	58,676	46,970
Operating Segments | Consumer Banking | Deposit service fees
Disaggregation of Revenue [Line Items]
Revenue from contract with customer	18,352	12,734	34,306	24,048
Operating Segments | Consumer Banking | Loan and lease related fees
Disaggregation of Revenue [Line Items]
Revenue from contract with customer	0		0
Operating Segments | Consumer Banking | Wealth and investment services
Disaggregation of Revenue [Line Items]
Revenue from contract with customer	8,479	7,053	15,950	13,546
Operating Segments | Consumer Banking | Other non interest income
Disaggregation of Revenue [Line Items]
Revenue from contract with customer	285	579	670	1,127
Operating Segments | Consumer Banking | Non-interest income within the scope of other GAAP topics
Disaggregation of Revenue [Line Items]
Revenue from contract with customer	3,668
Non-interest income		3,732	7,750	8,249
Corporate, Non-Segment
Disaggregation of Revenue [Line Items]
Revenue from contract with customer	432	114	478	152
Non-interest income	14,167	3,672	24,609	12,176
Corporate, Non-Segment | Deposit service fees
Disaggregation of Revenue [Line Items]
Revenue from contract with customer	437	123	491	170
Corporate, Non-Segment | Loan and lease related fees
Disaggregation of Revenue [Line Items]
Revenue from contract with customer	0		0
Corporate, Non-Segment | Wealth and investment services
Disaggregation of Revenue [Line Items]
Revenue from contract with customer	(5)	(9)	(13)	(18)
Corporate, Non-Segment | Other non interest income
Disaggregation of Revenue [Line Items]
Revenue from contract with customer	0	0	0	0
Corporate, Non-Segment | Non-interest income within the scope of other GAAP topics
Disaggregation of Revenue [Line Items]
Revenue from contract with customer	$ 13,735
Non-interest income		$ 3,558	$ 24,131	$ 12,024