Loans and Leases - Nonaccrual Loans and Leases by Loan Portfolio Segment and Class (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Dec. 31, 2020
Financing Receivable, Nonaccrual [Line Items]
Financing Receivable, Nonaccrual, Interest Income	$ 2,117	$ 108
Nonaccrual	67,652	95,602	$ 91,163
Real Estate Mortgage
Financing Receivable, Nonaccrual [Line Items]
Financing Receivable, Nonaccrual, Interest Income	287	84
Nonaccrual	48,907	21,396	45,557
Real Estate Construction and Land
Financing Receivable, Nonaccrual [Line Items]
Financing Receivable, Nonaccrual, Interest Income	0	0
Nonaccrual	718	351	315
Commercial
Financing Receivable, Nonaccrual [Line Items]
Financing Receivable, Nonaccrual, Interest Income	1,830	24
Nonaccrual	17,471	73,442	44,902
Consumer
Financing Receivable, Nonaccrual [Line Items]
Financing Receivable, Nonaccrual, Interest Income	0	0
Nonaccrual	556	413	389
Finance Receivable Allowance | Consumer
Financing Receivable, Nonaccrual [Line Items]
Financing Receivable, Nonaccrual, Interest Income	0	0
Nonaccrual	556	413
Residential Real Estate | Real Estate Mortgage
Financing Receivable, Nonaccrual [Line Items]
Financing Receivable, Nonaccrual, No Allowance	588	774
Nonaccrual	2,471		1,826
Residential Real Estate | No Finance Receivable Allowance | Real Estate Mortgage
Financing Receivable, Nonaccrual [Line Items]
Financing Receivable, Nonaccrual, Interest Income	0	0
Residential Real Estate | Finance Receivable Allowance | Real Estate Mortgage
Financing Receivable, Nonaccrual [Line Items]
Financing Receivable, Nonaccrual, Interest Income	0	0
Nonaccrual	1,883	1,534
Commercial | Real Estate Mortgage
Financing Receivable, Nonaccrual [Line Items]
Financing Receivable, Nonaccrual, No Allowance	46,360	18,746
Nonaccrual	46,436		43,731
Commercial | No Finance Receivable Allowance | Real Estate Mortgage
Financing Receivable, Nonaccrual [Line Items]
Financing Receivable, Nonaccrual, Interest Income	287	84
Commercial | Finance Receivable Allowance | Real Estate Mortgage
Financing Receivable, Nonaccrual [Line Items]
Financing Receivable, Nonaccrual, Interest Income	0	0
Nonaccrual	76	342
Residential Real Estate Construction Financing Receivable | Real Estate Construction and Land
Financing Receivable, Nonaccrual [Line Items]
Financing Receivable, Nonaccrual, No Allowance	300	0
Nonaccrual	416		0
Residential Real Estate Construction Financing Receivable | No Finance Receivable Allowance | Real Estate Construction and Land
Financing Receivable, Nonaccrual [Line Items]
Financing Receivable, Nonaccrual, Interest Income	0	0
Residential Real Estate Construction Financing Receivable | Finance Receivable Allowance | Real Estate Construction and Land
Financing Receivable, Nonaccrual [Line Items]
Financing Receivable, Nonaccrual, Interest Income	0	0
Nonaccrual	116	0
Commercial Real Estate Construction Loan Receivable | Real Estate Construction and Land
Financing Receivable, Nonaccrual [Line Items]
Financing Receivable, Nonaccrual, No Allowance	302	351
Nonaccrual	302		315
Commercial Real Estate Construction Loan Receivable | No Finance Receivable Allowance | Real Estate Construction and Land
Financing Receivable, Nonaccrual [Line Items]
Financing Receivable, Nonaccrual, Interest Income	0	0
Asset-based | Commercial
Financing Receivable, Nonaccrual [Line Items]
Financing Receivable, Nonaccrual, No Allowance	500	17,103
Nonaccrual	2,379		2,679
Asset-based | No Finance Receivable Allowance | Commercial
Financing Receivable, Nonaccrual [Line Items]
Financing Receivable, Nonaccrual, Interest Income	0	0
Asset-based | Finance Receivable Allowance | Commercial
Financing Receivable, Nonaccrual [Line Items]
Financing Receivable, Nonaccrual, Interest Income	0	0
Nonaccrual	1,880	0
Venture Capital Loans | Commercial
Financing Receivable, Nonaccrual [Line Items]
Financing Receivable, Nonaccrual, No Allowance	0	3,089
Nonaccrual	2,432		1,980
Venture Capital Loans | No Finance Receivable Allowance | Commercial
Financing Receivable, Nonaccrual [Line Items]
Financing Receivable, Nonaccrual, Interest Income	0	0
Venture Capital Loans | Finance Receivable Allowance | Commercial
Financing Receivable, Nonaccrual [Line Items]
Financing Receivable, Nonaccrual, Interest Income	0	0
Nonaccrual	2,432	15,524
Other Commercial
Financing Receivable, Nonaccrual [Line Items]
Financing Receivable, Nonaccrual, No Allowance	11,004	8,944
Other Commercial | Commercial
Financing Receivable, Nonaccrual [Line Items]
Nonaccrual	12,660		$ 40,243
Other Commercial | No Finance Receivable Allowance
Financing Receivable, Nonaccrual [Line Items]
Financing Receivable, Nonaccrual, Interest Income	1,830	24
Other Commercial | Finance Receivable Allowance | Commercial
Financing Receivable, Nonaccrual [Line Items]
Financing Receivable, Nonaccrual, Interest Income	0	0
Nonaccrual	$ 1,655	$ 28,782