Loans and Leases - Nonaccrual Loans and Leases by Loan Portfolio Segment and Class (Details) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
	Jun. 30, 2020	Jun. 30, 2020	Dec. 31, 2019
Financing Receivable, Nonaccrual [Line Items]
Financing Receivable, Nonaccrual, Interest Income	$ 1,258	$ 1,350
Nonaccrual	166,113	166,113	$ 92,353
Commercial
Financing Receivable, Nonaccrual [Line Items]
Financing Receivable, Nonaccrual, Interest Income	1,196	1,220
Nonaccrual	101,278	101,278	70,672
Consumer
Financing Receivable, Nonaccrual [Line Items]
Financing Receivable, Nonaccrual, Interest Income	0	0
Nonaccrual	520	520	493
Consumer | Finance Receivable Allowance
Financing Receivable, Nonaccrual [Line Items]
Financing Receivable, Nonaccrual, Interest Income	0	0
Nonaccrual	520	520
Real Estate Mortgage
Financing Receivable, Nonaccrual [Line Items]
Financing Receivable, Nonaccrual, Interest Income	62	130
Nonaccrual	63,978	63,978	20,824
Real Estate Construction and Land
Financing Receivable, Nonaccrual [Line Items]
Financing Receivable, Nonaccrual, Interest Income	0	0
Nonaccrual	337	337	364
Residential Real Estate | Real Estate Mortgage
Financing Receivable, Nonaccrual [Line Items]
Financing Receivable, Nonaccrual, No Allowance	762	762
Nonaccrual	2,207	2,207	2,478
Residential Real Estate | Real Estate Mortgage | No Finance Receivable Allowance
Financing Receivable, Nonaccrual [Line Items]
Financing Receivable, Nonaccrual, Interest Income	0	0
Residential Real Estate | Real Estate Mortgage | Finance Receivable Allowance
Financing Receivable, Nonaccrual [Line Items]
Financing Receivable, Nonaccrual, Interest Income	0	0
Nonaccrual	1,445	1,445
Commercial | Real Estate Mortgage
Financing Receivable, Nonaccrual [Line Items]
Financing Receivable, Nonaccrual, No Allowance	61,467	61,467
Nonaccrual	61,771	61,771	18,346
Commercial | Real Estate Mortgage | No Finance Receivable Allowance
Financing Receivable, Nonaccrual [Line Items]
Financing Receivable, Nonaccrual, Interest Income	62	130
Commercial | Real Estate Mortgage | Finance Receivable Allowance
Financing Receivable, Nonaccrual [Line Items]
Financing Receivable, Nonaccrual, Interest Income	0	0
Nonaccrual	304	304
Commercial Real Estate Construction Loan Receivable | Real Estate Construction and Land
Financing Receivable, Nonaccrual [Line Items]
Financing Receivable, Nonaccrual, No Allowance	337	337
Nonaccrual	337	337	364
Commercial Real Estate Construction Loan Receivable | Real Estate Construction and Land | No Finance Receivable Allowance
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	16,555	16,555
Nonaccrual	19,013	19,013	30,162
Asset-based | Commercial | No Finance Receivable Allowance
Financing Receivable, Nonaccrual [Line Items]
Financing Receivable, Nonaccrual, Interest Income	0	0
Asset-based | Commercial | Finance Receivable Allowance
Financing Receivable, Nonaccrual [Line Items]
Financing Receivable, Nonaccrual, Interest Income	0	0
Nonaccrual	2,458	2,458
Venture Capital Loans | Commercial
Financing Receivable, Nonaccrual [Line Items]
Nonaccrual	8,270	8,270	12,916
Venture Capital Loans | Commercial | Finance Receivable Allowance
Financing Receivable, Nonaccrual [Line Items]
Financing Receivable, Nonaccrual, Interest Income	0	0
Nonaccrual	8,270	8,270
Other Commercial
Financing Receivable, Nonaccrual [Line Items]
Financing Receivable, Nonaccrual, No Allowance	28,426	28,426
Other Commercial | No Finance Receivable Allowance
Financing Receivable, Nonaccrual [Line Items]
Financing Receivable, Nonaccrual, Interest Income	1,196	1,220
Other Commercial | Commercial
Financing Receivable, Nonaccrual [Line Items]
Nonaccrual	73,995	73,995	$ 27,594
Other Commercial | Commercial | Finance Receivable Allowance
Financing Receivable, Nonaccrual [Line Items]
Financing Receivable, Nonaccrual, Interest Income	0	0
Nonaccrual	$ 45,569	$ 45,569