Loans and Leases (Details 5) - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2018	Dec. 31, 2017		Dec. 31, 2016
Financing Receivable, Recorded Investment [Line Items]
Impaired Financing Receivable, Related Allowance		$ 4,031
Impaired Financing Receivable, Recorded Investment		97,034	$ 212,622	[1]
Impaired Financing Receivable, Unpaid Principal Balance		171,923
Impaired Financing Receivable, Average Recorded Investment	[2]	81,927
Impaired Financing Receivable, Interest Income, Accrual Method		1,052
Mortgages [Member]
Financing Receivable, Recorded Investment [Line Items]
Impaired Financing Receivable, Related Allowance		417
Impaired Financing Receivable, Recorded Investment		29,329
Impaired Financing Receivable, Unpaid Principal Balance		45,671
Impaired Financing Receivable, Average Recorded Investment	[2]	26,840
Impaired Financing Receivable, Interest Income, Accrual Method		564
Mortgages [Member] | Commercial Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Impaired Financing Receivable, with Related Allowance, Recorded Investment		1,736
Impaired Financing Receivable, with Related Allowance, Unpaid Principal Balance		1,648
Impaired Financing Receivable, Related Allowance		170
Impaired Financing Receivable, with No Related Allowance, Recorded Investment		17,783
Impaired Financing Receivable, with No Related Allowance, Unpaid Principal Balance		32,035
Impaired Financing Receivable, with Related Allowance, Average Recorded Investment	[2]	1,736
Impaired Financing Receivable, with Related Allowance, Interest Income, Accrual Method		72
Impaired Financing Receivable, with No Related Allowance, Average Recorded Investment	[2]	15,714
Impaired Financing Receivable, with No Related Allowance, Interest Income, Accrual Method		236
Mortgages [Member] | Residential Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Impaired Financing Receivable, with Related Allowance, Recorded Investment		2,569
Impaired Financing Receivable, with Related Allowance, Unpaid Principal Balance		2,563
Impaired Financing Receivable, Related Allowance		247
Impaired Financing Receivable, with No Related Allowance, Recorded Investment		7,241
Impaired Financing Receivable, with No Related Allowance, Unpaid Principal Balance		9,425
Impaired Financing Receivable, with Related Allowance, Average Recorded Investment	[2]	2,199
Impaired Financing Receivable, with Related Allowance, Interest Income, Accrual Method		75
Impaired Financing Receivable, with No Related Allowance, Average Recorded Investment	[2]	7,191
Impaired Financing Receivable, with No Related Allowance, Interest Income, Accrual Method		181
Real Estate Construction [Member]
Financing Receivable, Recorded Investment [Line Items]
Impaired Financing Receivable, Related Allowance		0
Impaired Financing Receivable, Recorded Investment		5,862
Impaired Financing Receivable, Unpaid Principal Balance		5,870
Impaired Financing Receivable, Average Recorded Investment	[2]	5,460
Impaired Financing Receivable, Interest Income, Accrual Method		383
Real Estate Construction [Member] | Commercial Real Estate Construction Loan Receivable [Member]
Financing Receivable, Recorded Investment [Line Items]
Impaired Financing Receivable, with No Related Allowance, Recorded Investment		5,862
Impaired Financing Receivable, with No Related Allowance, Unpaid Principal Balance		5,870
Impaired Financing Receivable, with No Related Allowance, Average Recorded Investment	[2]	5,460
Impaired Financing Receivable, with No Related Allowance, Interest Income, Accrual Method		383
Real Estate Construction [Member] | Residential Real Estate Construction Financing Receivable [Member]
Financing Receivable, Recorded Investment [Line Items]
Impaired Financing Receivable, with No Related Allowance, Average Recorded Investment	[2]	0
Impaired Financing Receivable, with No Related Allowance, Interest Income, Accrual Method		0
Commercial Portfolio Segment [Member]
Financing Receivable, Recorded Investment [Line Items]
Impaired Financing Receivable, Related Allowance		3,614
Impaired Financing Receivable, Recorded Investment		60,695
Impaired Financing Receivable, Unpaid Principal Balance		118,912
Impaired Financing Receivable, Average Recorded Investment	[2]	48,783
Impaired Financing Receivable, Interest Income, Accrual Method		98
Commercial Portfolio Segment [Member] | Asset Based [Member]
Financing Receivable, Recorded Investment [Line Items]
Impaired Financing Receivable, with No Related Allowance, Recorded Investment		32,324
Impaired Financing Receivable, with No Related Allowance, Unpaid Principal Balance		38,100
Impaired Financing Receivable, with Related Allowance, Average Recorded Investment	[2],[3]	0
Impaired Financing Receivable, with Related Allowance, Interest Income, Accrual Method		0
Impaired Financing Receivable, with No Related Allowance, Average Recorded Investment	[2],[3]	32,324
Impaired Financing Receivable, with No Related Allowance, Interest Income, Accrual Method		0
Commercial Portfolio Segment [Member] | Venture Capital Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Impaired Financing Receivable, with Related Allowance, Recorded Investment		11,621
Impaired Financing Receivable, with Related Allowance, Unpaid Principal Balance		13,255
Impaired Financing Receivable, Related Allowance		3,141
Impaired Financing Receivable, with No Related Allowance, Recorded Investment		8,678
Impaired Financing Receivable, with No Related Allowance, Unpaid Principal Balance		41,335
Impaired Financing Receivable, with Related Allowance, Average Recorded Investment	[2],[3]	9,449
Impaired Financing Receivable, with Related Allowance, Interest Income, Accrual Method		0
Impaired Financing Receivable, with No Related Allowance, Average Recorded Investment	[2],[3]	689
Impaired Financing Receivable, with No Related Allowance, Interest Income, Accrual Method		0
Commercial Portfolio Segment [Member] | Other Commercial [Member]
Financing Receivable, Recorded Investment [Line Items]
Impaired Financing Receivable, with Related Allowance, Recorded Investment		473
Impaired Financing Receivable, with Related Allowance, Unpaid Principal Balance		482
Impaired Financing Receivable, Related Allowance		473
Impaired Financing Receivable, with No Related Allowance, Recorded Investment		7,599
Impaired Financing Receivable, with No Related Allowance, Unpaid Principal Balance		25,740
Impaired Financing Receivable, with Related Allowance, Average Recorded Investment	[2],[3]	35
Impaired Financing Receivable, with Related Allowance, Interest Income, Accrual Method		0
Impaired Financing Receivable, with No Related Allowance, Average Recorded Investment	[2],[3]	6,286
Impaired Financing Receivable, with No Related Allowance, Interest Income, Accrual Method		98
Consumer Portfolio Segment [Member]
Financing Receivable, Recorded Investment [Line Items]
Impaired Financing Receivable, with Related Allowance, Recorded Investment		0
Impaired Financing Receivable, with Related Allowance, Unpaid Principal Balance		0
Impaired Financing Receivable, Related Allowance		0
Impaired Financing Receivable, with No Related Allowance, Recorded Investment		1,148
Impaired Financing Receivable, with No Related Allowance, Unpaid Principal Balance		1,470
Impaired Financing Receivable, Recorded Investment		1,148
Impaired Financing Receivable, Unpaid Principal Balance		1,470
Impaired Financing Receivable, with Related Allowance, Average Recorded Investment	[2]	0
Impaired Financing Receivable, with Related Allowance, Interest Income, Accrual Method		0
Impaired Financing Receivable, with No Related Allowance, Average Recorded Investment	[2]	844
Impaired Financing Receivable, with No Related Allowance, Interest Income, Accrual Method		7
Impaired Financing Receivable, Average Recorded Investment	[2]	844
Impaired Financing Receivable, Interest Income, Accrual Method		7
Non Purchased Credit Impaired Loans and Leases [Member]
Financing Receivable, Recorded Investment [Line Items]
Impaired Financing Receivable, Related Allowance	[4]		13,621
Impaired Financing Receivable, Recorded Investment	[4]		212,622
Impaired Financing Receivable, Unpaid Principal Balance	[4]		287,236
Impaired Financing Receivable, Average Recorded Investment	[2],[3]		185,740		$ 154,727
Impaired Financing Receivable, Interest Income, Accrual Method			4,101		3,216
Non Purchased Credit Impaired Loans and Leases [Member] | Mortgages [Member]
Financing Receivable, Recorded Investment [Line Items]
Impaired Financing Receivable, Related Allowance	[4]		970
Impaired Financing Receivable, Recorded Investment	[1],[4]		116,473
Impaired Financing Receivable, Unpaid Principal Balance	[4]		129,909
Impaired Financing Receivable, Average Recorded Investment	[2],[3]		111,721		82,562
Impaired Financing Receivable, Interest Income, Accrual Method			3,643		2,803
Non Purchased Credit Impaired Loans and Leases [Member] | Mortgages [Member] | Commercial Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Impaired Financing Receivable, with Related Allowance, Recorded Investment	[4]		15,750
Impaired Financing Receivable, with Related Allowance, Unpaid Principal Balance	[4]		16,548
Impaired Financing Receivable, Related Allowance	[4]		628
Impaired Financing Receivable, with No Related Allowance, Recorded Investment	[4]		93,827
Impaired Financing Receivable, with No Related Allowance, Unpaid Principal Balance	[4]		105,923
Impaired Financing Receivable, with Related Allowance, Average Recorded Investment	[2],[3]		15,538		26,870
Impaired Financing Receivable, with Related Allowance, Interest Income, Accrual Method			881		898
Impaired Financing Receivable, with No Related Allowance, Average Recorded Investment	[2],[3]		89,554		41,917
Impaired Financing Receivable, with No Related Allowance, Interest Income, Accrual Method			2,648		1,506
Non Purchased Credit Impaired Loans and Leases [Member] | Mortgages [Member] | Residential Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Impaired Financing Receivable, with Related Allowance, Recorded Investment	[4]		2,787
Impaired Financing Receivable, with Related Allowance, Unpaid Principal Balance	[4]		2,957
Impaired Financing Receivable, Related Allowance	[4]		342
Impaired Financing Receivable, with No Related Allowance, Recorded Investment	[4]		4,109
Impaired Financing Receivable, with No Related Allowance, Unpaid Principal Balance	[4]		4,481
Impaired Financing Receivable, with Related Allowance, Average Recorded Investment	[2],[3]		2,787		6,521
Impaired Financing Receivable, with Related Allowance, Interest Income, Accrual Method			55		255
Impaired Financing Receivable, with No Related Allowance, Average Recorded Investment	[2],[3]		3,842		7,254
Impaired Financing Receivable, with No Related Allowance, Interest Income, Accrual Method			59		144
Non Purchased Credit Impaired Loans and Leases [Member] | Real Estate Construction [Member]
Financing Receivable, Recorded Investment [Line Items]
Impaired Financing Receivable, Related Allowance	[4]		0
Impaired Financing Receivable, Recorded Investment	[1],[4]		5,690
Impaired Financing Receivable, Unpaid Principal Balance	[4]		5,689
Impaired Financing Receivable, Average Recorded Investment	[2],[3]		5,690		7,257
Impaired Financing Receivable, Interest Income, Accrual Method			306		238
Non Purchased Credit Impaired Loans and Leases [Member] | Real Estate Construction [Member] | Commercial Real Estate Construction Loan Receivable [Member]
Financing Receivable, Recorded Investment [Line Items]
Impaired Financing Receivable, with No Related Allowance, Recorded Investment	[4]		5,690
Impaired Financing Receivable, with No Related Allowance, Unpaid Principal Balance	[4]		5,689
Impaired Financing Receivable, with No Related Allowance, Average Recorded Investment	[2],[3]		5,690		6,680
Impaired Financing Receivable, with No Related Allowance, Interest Income, Accrual Method			306		224
Non Purchased Credit Impaired Loans and Leases [Member] | Real Estate Construction [Member] | Residential Real Estate Construction Financing Receivable [Member]
Financing Receivable, Recorded Investment [Line Items]
Impaired Financing Receivable, with Related Allowance, Average Recorded Investment	[2]	0	0	[3]	213	[3]
Impaired Financing Receivable, with Related Allowance, Interest Income, Accrual Method		$ 0	0		14
Impaired Financing Receivable, with No Related Allowance, Average Recorded Investment	[2],[3]		0		364
Impaired Financing Receivable, with No Related Allowance, Interest Income, Accrual Method			0		0
Non Purchased Credit Impaired Loans and Leases [Member] | Commercial Portfolio Segment [Member]
Financing Receivable, Recorded Investment [Line Items]
Impaired Financing Receivable, Related Allowance	[4]		12,635
Impaired Financing Receivable, Recorded Investment	[1],[4]		90,339
Impaired Financing Receivable, Unpaid Principal Balance	[4]		151,445
Impaired Financing Receivable, Average Recorded Investment	[2],[3]		68,209		64,509
Impaired Financing Receivable, Interest Income, Accrual Method			144		166
Non Purchased Credit Impaired Loans and Leases [Member] | Commercial Portfolio Segment [Member] | Asset Based [Member]
Financing Receivable, Recorded Investment [Line Items]
Impaired Financing Receivable, with No Related Allowance, Recorded Investment	[4]		33,553
Impaired Financing Receivable, with No Related Allowance, Unpaid Principal Balance	[4]		54,911
Impaired Financing Receivable, with Related Allowance, Average Recorded Investment	[2],[3]		0		1,227
Impaired Financing Receivable, with Related Allowance, Interest Income, Accrual Method			0		0
Impaired Financing Receivable, with No Related Allowance, Average Recorded Investment	[2],[3]		31,388		2,446
Impaired Financing Receivable, with No Related Allowance, Interest Income, Accrual Method			0		0
Non Purchased Credit Impaired Loans and Leases [Member] | Commercial Portfolio Segment [Member] | Venture Capital Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Impaired Financing Receivable, with Related Allowance, Recorded Investment	[4]		16,565
Impaired Financing Receivable, with Related Allowance, Unpaid Principal Balance	[4]		17,203
Impaired Financing Receivable, Related Allowance	[4]		4,267
Impaired Financing Receivable, with No Related Allowance, Recorded Investment	[4]		14,534
Impaired Financing Receivable, with No Related Allowance, Unpaid Principal Balance	[4]		40,029
Impaired Financing Receivable, with Related Allowance, Average Recorded Investment	[2],[3]		10,228		26,578
Impaired Financing Receivable, with Related Allowance, Interest Income, Accrual Method			0		144
Impaired Financing Receivable, with No Related Allowance, Average Recorded Investment	[2],[3]		2,860		2,750
Impaired Financing Receivable, with No Related Allowance, Interest Income, Accrual Method			0		22
Non Purchased Credit Impaired Loans and Leases [Member] | Commercial Portfolio Segment [Member] | Other Commercial [Member]
Financing Receivable, Recorded Investment [Line Items]
Impaired Financing Receivable, with Related Allowance, Recorded Investment	[4]		20,404
Impaired Financing Receivable, with Related Allowance, Unpaid Principal Balance	[4]		29,951
Impaired Financing Receivable, Related Allowance	[4]		8,368
Impaired Financing Receivable, with No Related Allowance, Recorded Investment	[4]		5,283
Impaired Financing Receivable, with No Related Allowance, Unpaid Principal Balance	[4]		9,351
Impaired Financing Receivable, with Related Allowance, Average Recorded Investment	[2],[3]		20,329
Impaired Financing Receivable, with Related Allowance, Interest Income, Accrual Method			60
Impaired Financing Receivable, with No Related Allowance, Average Recorded Investment	[2],[3]		3,404
Impaired Financing Receivable, with No Related Allowance, Interest Income, Accrual Method			84
Non Purchased Credit Impaired Loans and Leases [Member] | Commercial Portfolio Segment [Member] | Cash Flow [Member]
Financing Receivable, Recorded Investment [Line Items]
Impaired Financing Receivable, with Related Allowance, Average Recorded Investment	[2],[3]				508
Impaired Financing Receivable, with Related Allowance, Interest Income, Accrual Method					0
Impaired Financing Receivable, with No Related Allowance, Average Recorded Investment	[2],[3]				31,000
Impaired Financing Receivable, with No Related Allowance, Interest Income, Accrual Method					0
Non Purchased Credit Impaired Loans and Leases [Member] | Consumer Portfolio Segment [Member]
Financing Receivable, Recorded Investment [Line Items]
Impaired Financing Receivable, with Related Allowance, Recorded Investment	[4]		100
Impaired Financing Receivable, with Related Allowance, Unpaid Principal Balance	[4]		100
Impaired Financing Receivable, Related Allowance	[4]		16
Impaired Financing Receivable, with No Related Allowance, Recorded Investment	[4]		20
Impaired Financing Receivable, with No Related Allowance, Unpaid Principal Balance	[4]		93
Impaired Financing Receivable, Recorded Investment	[1],[4]		120
Impaired Financing Receivable, Unpaid Principal Balance	[4]		193
Impaired Financing Receivable, with Related Allowance, Average Recorded Investment	[2],[3]		100		233
Impaired Financing Receivable, with Related Allowance, Interest Income, Accrual Method			8		0
Impaired Financing Receivable, with No Related Allowance, Average Recorded Investment	[2],[3]		20		166
Impaired Financing Receivable, with No Related Allowance, Interest Income, Accrual Method			0		9
Impaired Financing Receivable, Average Recorded Investment	[2],[3]		120		399
Impaired Financing Receivable, Interest Income, Accrual Method			$ 8		$ 9

[1] Excludes PCI loans.

[2] For loans and leases reported as impaired at December 31, 2018, 2017, and 2016, amounts were calculated based on the period of time such loans and leases were impaired during the reported period.

[3] Excludes PCI loans.

[4] Excludes PCI loans.