Loans and Leases (Details 6) $ in Thousands		12 Months Ended
		Dec. 31, 2019 USD ($) contract Contract	Dec. 31, 2018 USD ($) contract Contract	Dec. 31, 2017 USD ($) contract Contract
Financing Receivable, Troubled Debt Restructuring [Line Items]
Financing Receivable, Modifications, Number of Contracts		51	60	50
Financing Receivable, Troubled Debt Restructuring, Premodification		$ 27,646	$ 101,878	$ 69,737
Financing Receivable, Troubled Debt Restructuring, Postmodification		$ 27,663	$ 90,373	$ 59,237
Financing Receivable, Troubled Debt Restructuring, Subsequent Default, Number of Contracts | Contract		5	0	1
Financing Receivable, Troubled Debt Restructuring, Subsequent Default	[1]	$ 408		$ 1
Mortgages [Member] | Commercial Real Estate [Member]
Financing Receivable, Troubled Debt Restructuring [Line Items]
Financing Receivable, Modifications, Number of Contracts		3	10	5
Financing Receivable, Troubled Debt Restructuring, Premodification		$ 121	$ 17,181	$ 2,527
Financing Receivable, Troubled Debt Restructuring, Postmodification		$ 0	$ 2,604	$ 2,463
Financing Receivable, Troubled Debt Restructuring, Subsequent Default, Number of Contracts		0	0	0
Financing Receivable, Troubled Debt Restructuring, Subsequent Default	[1]	$ 0	$ 0	$ 0
Mortgages [Member] | Residential Real Estate [Member]
Financing Receivable, Troubled Debt Restructuring [Line Items]
Financing Receivable, Modifications, Number of Contracts		9	10	8
Financing Receivable, Troubled Debt Restructuring, Premodification		$ 1,591	$ 3,262	$ 1,328
Financing Receivable, Troubled Debt Restructuring, Postmodification		$ 1,591	$ 2,203	$ 489
Financing Receivable, Troubled Debt Restructuring, Subsequent Default, Number of Contracts		1	0	0
Financing Receivable, Troubled Debt Restructuring, Subsequent Default	[1]	$ 254	$ 0	$ 0
Real Estate Construction [Member] | Residential Real Estate Construction Financing Receivable [Member]
Financing Receivable, Troubled Debt Restructuring [Line Items]
Financing Receivable, Modifications, Number of Contracts | Contract				1
Financing Receivable, Troubled Debt Restructuring, Premodification				$ 362
Financing Receivable, Troubled Debt Restructuring, Postmodification				$ 0
Financing Receivable, Troubled Debt Restructuring, Subsequent Default, Number of Contracts				0
Financing Receivable, Troubled Debt Restructuring, Subsequent Default				$ 0
Commercial Portfolio Segment [Member] | Asset Based [Member]
Financing Receivable, Troubled Debt Restructuring [Line Items]
Financing Receivable, Modifications, Number of Contracts | contract		5	4	5	[2]
Financing Receivable, Troubled Debt Restructuring, Premodification		$ 3,082	$ 28,947	$ 4,219	[2]
Financing Receivable, Troubled Debt Restructuring, Postmodification		$ 3,082	$ 33,947	$ 4,219	[2]
Financing Receivable, Troubled Debt Restructuring, Subsequent Default, Number of Contracts | Contract		0	0	0	[2]
Financing Receivable, Troubled Debt Restructuring, Subsequent Default	[1]	$ 0	$ 0	$ 0
Commercial Portfolio Segment [Member] | Venture Capital Loans [Member]
Financing Receivable, Troubled Debt Restructuring [Line Items]
Financing Receivable, Modifications, Number of Contracts		14	14	11
Financing Receivable, Troubled Debt Restructuring, Premodification		$ 19,017	$ 37,416	$ 29,733
Financing Receivable, Troubled Debt Restructuring, Postmodification		$ 19,155	$ 36,919	$ 29,733
Financing Receivable, Troubled Debt Restructuring, Subsequent Default, Number of Contracts | Contract				0
Financing Receivable, Troubled Debt Restructuring, Subsequent Default	[1]			$ 0
Commercial Portfolio Segment [Member] | Other Commercial [Member]
Financing Receivable, Troubled Debt Restructuring [Line Items]
Financing Receivable, Modifications, Number of Contracts | contract		20	19	19
Financing Receivable, Troubled Debt Restructuring, Premodification		$ 3,835	$ 14,399	$ 31,471
Financing Receivable, Troubled Debt Restructuring, Postmodification		$ 3,835	$ 14,027	$ 22,236
Consumer Portfolio Segment [Member]
Financing Receivable, Troubled Debt Restructuring [Line Items]
Financing Receivable, Modifications, Number of Contracts			3	1
Financing Receivable, Troubled Debt Restructuring, Premodification			$ 673	$ 97
Financing Receivable, Troubled Debt Restructuring, Postmodification			$ 673	$ 97
Other Commercial [Member] | Commercial Portfolio Segment [Member]
Financing Receivable, Troubled Debt Restructuring [Line Items]
Financing Receivable, Troubled Debt Restructuring, Subsequent Default, Number of Contracts | contract		4	0
Financing Receivable, Troubled Debt Restructuring, Subsequent Default		$ 154	$ 0
Equipment Finance Commercial Financing Receivable [Member] | Venture Capital Loans [Member]
Financing Receivable, Troubled Debt Restructuring [Line Items]
Financing Receivable, Troubled Debt Restructuring, Subsequent Default, Number of Contracts | contract		0
Financing Receivable, Troubled Debt Restructuring, Subsequent Default	[1]	$ 0
Commercial Portfolio Segment [Member] | Commercial Portfolio Segment [Member] | Cash Flow [Member]
Financing Receivable, Troubled Debt Restructuring [Line Items]
Financing Receivable, Troubled Debt Restructuring, Subsequent Default	[1]		$ 0
Commercial Portfolio Segment [Member] | Commercial Portfolio Segment [Member] | Other Commercial [Member]
Financing Receivable, Troubled Debt Restructuring [Line Items]
Financing Receivable, Troubled Debt Restructuring, Subsequent Default, Number of Contracts | Contract				1
Financing Receivable, Troubled Debt Restructuring, Subsequent Default	[1]			$ 1
Consumer Portfolio Segment [Member] | Consumer Portfolio Segment [Member]
Financing Receivable, Troubled Debt Restructuring [Line Items]
Financing Receivable, Troubled Debt Restructuring, Subsequent Default, Number of Contracts | Contract			0	0
Financing Receivable, Troubled Debt Restructuring, Subsequent Default	[1]		$ 0	$ 0
Finance Receivable, Modification of Modified Loan [Member] | Commercial Portfolio Segment [Member] | Asset Based [Member]
Financing Receivable, Troubled Debt Restructuring [Line Items]
Financing Receivable, Troubled Debt Restructuring, Premodification	[2]	27,300
Financing Receivable, Troubled Debt Restructuring, Postmodification	[2]	$ 32,300

[1] The population of defaulted TDRs for the period indicated includes only those loans restructured during the preceding 12-month period. For example, for the year ended December 31, 2019, the population of defaulted TDRs includes only those loans restructured after December 31, 2018. The table excludes defaulted TDRs in those classes for which the recorded investment was zero at the end of the period.

[2] One commercial asset-based loan with a pre-modification balance of $27.3 million and a post-modification balance of $32.3 million was previously restructured in December 2017.