Loans and Leases (Details 5) - USD ($) $ in Thousands		3 Months Ended
		Mar. 31, 2019	Mar. 31, 2018	Dec. 31, 2018
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, with Related Allowance, Related Allowance		$ 6,201
Total Impaired Loans and Leases		105,554		$ 97,034
Impaired Financing Receivable, Unpaid Principal Balance		178,141
Impaired Financing Receivable, Average Recorded Investment	[1]	89,645
Impaired Financing Receivable, Interest Income, Accrual Method		259
Real Estate Mortgage
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, with Related Allowance, Related Allowance		270
Total Impaired Loans and Leases		26,549
Impaired Financing Receivable, Unpaid Principal Balance		42,960
Impaired Financing Receivable, Average Recorded Investment	[1]	26,283
Impaired Financing Receivable, Interest Income, Accrual Method		139
Real Estate Construction and Land
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, with Related Allowance, Related Allowance		0
Total Impaired Loans and Leases		5,432
Impaired Financing Receivable, Unpaid Principal Balance		5,449
Impaired Financing Receivable, Average Recorded Investment	[1]	5,432
Impaired Financing Receivable, Interest Income, Accrual Method		101
Commercial
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, with Related Allowance, Related Allowance		5,931
Total Impaired Loans and Leases		73,049
Impaired Financing Receivable, Unpaid Principal Balance		129,039
Impaired Financing Receivable, Average Recorded Investment	[1]	57,406
Impaired Financing Receivable, Interest Income, Accrual Method		17
Consumer
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, with Related Allowance, Related Allowance		0
Impaired Financing Receivable, with No Related Allowance, Recorded Investment		524
Impaired Financing Receivable, with No Related Allowance, Unpaid Principal Balance		693
Impaired Financing Receivable, with Related Allowance, Average Recorded Investment	[1]	0
Impaired Financing Receivable, with Related Allowance, Interest Income, Accrual Method		0
Impaired Financing Receivable, with No Related Allowance, Average Recorded Investment	[1]	524
Impaired Financing Receivable, with No Related Allowance, Interest Income, Accrual Method		2
Total Impaired Loans and Leases		524
Impaired Financing Receivable, Unpaid Principal Balance		693
Impaired Financing Receivable, Average Recorded Investment	[1]	524
Impaired Financing Receivable, Interest Income, Accrual Method		2
Non Purchased Credit Impaired Loans and Leases
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, with Related Allowance, Related Allowance				4,031
Total Impaired Loans and Leases				97,034
Impaired Financing Receivable, Unpaid Principal Balance				171,923
Impaired Financing Receivable, Average Recorded Investment	[1]		$ 156,089
Impaired Financing Receivable, Interest Income, Accrual Method			2,287
Non Purchased Credit Impaired Loans and Leases | Real Estate Mortgage
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, with Related Allowance, Related Allowance				417
Total Impaired Loans and Leases				29,329
Impaired Financing Receivable, Unpaid Principal Balance				45,671
Impaired Financing Receivable, Average Recorded Investment	[1]		73,425
Impaired Financing Receivable, Interest Income, Accrual Method			1,034
Non Purchased Credit Impaired Loans and Leases | Real Estate Construction and Land
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, with Related Allowance, Related Allowance				0
Total Impaired Loans and Leases				5,862
Impaired Financing Receivable, Unpaid Principal Balance				5,870
Impaired Financing Receivable, Average Recorded Investment	[1]		5,670
Impaired Financing Receivable, Interest Income, Accrual Method			89
Non Purchased Credit Impaired Loans and Leases | Commercial
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, with Related Allowance, Related Allowance				3,614
Total Impaired Loans and Leases				60,695
Impaired Financing Receivable, Unpaid Principal Balance				118,912
Impaired Financing Receivable, Average Recorded Investment	[1]		76,620
Impaired Financing Receivable, Interest Income, Accrual Method			1,162
Non Purchased Credit Impaired Loans and Leases | Consumer
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, with Related Allowance, 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, with Related Allowance, Average Recorded Investment	[1]		295
Impaired Financing Receivable, with Related Allowance, Interest Income, Accrual Method			2
Impaired Financing Receivable, with No Related Allowance, Average Recorded Investment	[1]		79
Impaired Financing Receivable, with No Related Allowance, Interest Income, Accrual Method			0
Total Impaired Loans and Leases				1,148
Impaired Financing Receivable, Unpaid Principal Balance				1,470
Impaired Financing Receivable, Average Recorded Investment	[1]		374
Impaired Financing Receivable, Interest Income, Accrual Method			2
Asset Based | Commercial
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, with No Related Allowance, Recorded Investment		33,071
Impaired Financing Receivable, with No Related Allowance, Unpaid Principal Balance		38,401
Impaired Financing Receivable, with Related Allowance, Average Recorded Investment	[1]	3,560
Impaired Financing Receivable, with Related Allowance, Interest Income, Accrual Method		0
Impaired Financing Receivable, with No Related Allowance, Average Recorded Investment	[1]	31,979
Impaired Financing Receivable, with No Related Allowance, Interest Income, Accrual Method		0
Asset Based | Non Purchased Credit Impaired Loans and Leases | Commercial
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, with Related Allowance, Recorded Investment		10,335		0
Impaired Financing Receivable, with Related Allowance, Unpaid Principal Balance		10,335		0
Impaired Financing Receivable, with Related Allowance, Related Allowance		2,735		0
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	[1]		0
Impaired Financing Receivable, with Related Allowance, Interest Income, Accrual Method			0
Impaired Financing Receivable, with No Related Allowance, Average Recorded Investment	[1]		32,838
Impaired Financing Receivable, with No Related Allowance, Interest Income, Accrual Method			0
Venture Capital Loans | Commercial
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, with Related Allowance, Recorded Investment		19,243
Impaired Financing Receivable, with Related Allowance, Unpaid Principal Balance		21,029
Impaired Financing Receivable, with Related Allowance, Related Allowance		3,196
Impaired Financing Receivable, with No Related Allowance, Recorded Investment		1,194
Impaired Financing Receivable, with No Related Allowance, Unpaid Principal Balance		31,632
Impaired Financing Receivable, with Related Allowance, Average Recorded Investment	[1]	12,906
Impaired Financing Receivable, with Related Allowance, Interest Income, Accrual Method		0
Impaired Financing Receivable, with No Related Allowance, Average Recorded Investment	[1]	1,194
Impaired Financing Receivable, with No Related Allowance, Interest Income, Accrual Method		0
Venture Capital Loans | Non Purchased Credit Impaired Loans and Leases | Commercial
Financing Receivable, Impaired [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, with Related Allowance, 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	[1]		14,598
Impaired Financing Receivable, with Related Allowance, Interest Income, Accrual Method			0
Impaired Financing Receivable, with No Related Allowance, Average Recorded Investment	[1]		4,474
Impaired Financing Receivable, with No Related Allowance, Interest Income, Accrual Method			0
Other Commercial | Commercial
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, with Related Allowance, Recorded Investment		0
Impaired Financing Receivable, with Related Allowance, Unpaid Principal Balance		0
Impaired Financing Receivable, with Related Allowance, Related Allowance		0
Impaired Financing Receivable, with No Related Allowance, Recorded Investment		9,206
Impaired Financing Receivable, with No Related Allowance, Unpaid Principal Balance		27,642
Impaired Financing Receivable, with Related Allowance, Average Recorded Investment	[1]	0
Impaired Financing Receivable, with Related Allowance, Interest Income, Accrual Method		0
Impaired Financing Receivable, with No Related Allowance, Average Recorded Investment	[1]	7,767
Impaired Financing Receivable, with No Related Allowance, Interest Income, Accrual Method		17
Other Commercial | Non Purchased Credit Impaired Loans and Leases | Commercial
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, with Related Allowance, Recorded Investment				473
Impaired Financing Receivable, with Related Allowance, Unpaid Principal Balance				482
Impaired Financing Receivable, with Related Allowance, 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	[1]		16,851
Impaired Financing Receivable, with Related Allowance, Interest Income, Accrual Method			15
Impaired Financing Receivable, with No Related Allowance, Average Recorded Investment	[1]		7,859
Impaired Financing Receivable, with No Related Allowance, Interest Income, Accrual Method			1,147
Commercial Real Estate Construction Loan Receivable | Real Estate Construction and Land
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, with No Related Allowance, Recorded Investment		5,432
Impaired Financing Receivable, with No Related Allowance, Unpaid Principal Balance		5,449
Impaired Financing Receivable, with No Related Allowance, Average Recorded Investment	[1]	5,432
Impaired Financing Receivable, with No Related Allowance, Interest Income, Accrual Method		101
Commercial Real Estate Construction Loan Receivable | Non Purchased Credit Impaired Loans and Leases | Real Estate Construction and Land
Financing Receivable, Impaired [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	[1]		5,670
Impaired Financing Receivable, with No Related Allowance, Interest Income, Accrual Method			89
Commercial | Real Estate Mortgage
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, with Related Allowance, Recorded Investment		1,139
Impaired Financing Receivable, with Related Allowance, Unpaid Principal Balance		1,139
Impaired Financing Receivable, with Related Allowance, Related Allowance		68
Impaired Financing Receivable, with No Related Allowance, Recorded Investment		15,727
Impaired Financing Receivable, with No Related Allowance, Unpaid Principal Balance		29,962
Impaired Financing Receivable, with Related Allowance, Average Recorded Investment	[1]	1,139
Impaired Financing Receivable, with Related Allowance, Interest Income, Accrual Method		17
Impaired Financing Receivable, with No Related Allowance, Average Recorded Investment	[1]	15,538
Impaired Financing Receivable, with No Related Allowance, Interest Income, Accrual Method		53
Commercial | Non Purchased Credit Impaired Loans and Leases | Real Estate Mortgage
Financing Receivable, Impaired [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, with Related Allowance, 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	[1]		13,884
Impaired Financing Receivable, with Related Allowance, Interest Income, Accrual Method			201
Impaired Financing Receivable, with No Related Allowance, Average Recorded Investment	[1]		46,782
Impaired Financing Receivable, with No Related Allowance, Interest Income, Accrual Method			765
Residential Real Estate | Real Estate Mortgage
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, with Related Allowance, Recorded Investment		2,090
Impaired Financing Receivable, with Related Allowance, Unpaid Principal Balance		2,084
Impaired Financing Receivable, with Related Allowance, Related Allowance		202
Impaired Financing Receivable, with No Related Allowance, Recorded Investment		7,593
Impaired Financing Receivable, with No Related Allowance, Unpaid Principal Balance		9,775
Impaired Financing Receivable, with Related Allowance, Average Recorded Investment	[1]	2,090
Impaired Financing Receivable, with Related Allowance, Interest Income, Accrual Method		16
Impaired Financing Receivable, with No Related Allowance, Average Recorded Investment	[1]	7,516
Impaired Financing Receivable, with No Related Allowance, Interest Income, Accrual Method		$ 53
Residential Real Estate | Non Purchased Credit Impaired Loans and Leases | Real Estate Mortgage
Financing Receivable, Impaired [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, with Related Allowance, 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	[1]		4,295
Impaired Financing Receivable, with Related Allowance, Interest Income, Accrual Method			23
Impaired Financing Receivable, with No Related Allowance, Average Recorded Investment	[1]		8,464
Impaired Financing Receivable, with No Related Allowance, Interest Income, Accrual Method			$ 45

[1] For loans and leases reported as impaired at March 31, 2019 and 2018, amounts were calculated based on the period of time such loans and leases were impaired during the reported period.