Revenue From Contracts With Customers - Disaggregation of Revenue (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]
Total interest income	$ 350,518	$ 280,505	$ 673,422	$ 553,842
Service charges on deposit accounts	3,634	3,452	7,205	6,386
Other commissions and fees	10,813	10,704	22,393	19,862
Leased equipment income	12,335	10,847	25,429	22,201
Gain on sale of loans and leases	12	1,422	72	1,561
Net realized (losses) gains	(1,209)	0	(1,105)	101
Other income	3,049	2,902	6,204	7,018
Total noninterest income	34,346	40,371	55,164	85,200
Revenues	384,864	320,876	728,586	639,042
Service charges on deposit accounts	7,700	6,449	15,042	12,420
Dividends and Gains (Losses) on Equity Investments	4,097	5,394	(7,278)	16,298
Warrant income	1,615	5,650	2,244	11,773
Interest Income
Disaggregation of Revenue [Line Items]
Service charges on deposit accounts	0	0	0	0
Service charges on deposit accounts
Disaggregation of Revenue [Line Items]
Service charges on deposit accounts	3,634	3,452	7,205	6,386
Other commissions and fees
Disaggregation of Revenue [Line Items]
Service charges on deposit accounts	4,001	2,603	7,774	5,460
Leased equipment income
Disaggregation of Revenue [Line Items]
Service charges on deposit accounts	0	0	0	0
Gain on sale of loans
Disaggregation of Revenue [Line Items]
Service charges on deposit accounts	0	0	0	0
Gain on sale of securities
Disaggregation of Revenue [Line Items]
Service charges on deposit accounts	0	0	0	0
Other income
Disaggregation of Revenue [Line Items]
Service charges on deposit accounts	65	394	63	574
Noninterest Income
Disaggregation of Revenue [Line Items]
Service charges on deposit accounts	7,700	6,449	15,042	12,420
Dividends and Gains (Losses) on Equity Investments
Disaggregation of Revenue [Line Items]
Service charges on deposit accounts	0	0	0	0
Warranty Income
Disaggregation of Revenue [Line Items]
Service charges on deposit accounts	$ 0	$ 0	$ 0	$ 0