Loans and Leases (Details 5) - USD ($) $ in Thousands	3 Months Ended				9 Months Ended
	Sep. 30, 2017		Sep. 30, 2016		Sep. 30, 2017		Sep. 30, 2016		Dec. 31, 2016
Financing Receivable, Impaired [Line Items]
Total Impaired Loans and Leases	$ 214,249				$ 214,249				$ 235,551
Non Purchased Credit Impaired Loans and Leases
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, with Related Allowance, Related Allowance	16,182				16,182				24,933
Total Impaired Loans and Leases	214,249				214,249				235,551
Impaired Financing Receivable, Unpaid Principal Balance	264,863				264,863				279,952
Impaired Financing Receivable, Average Recorded Investment	209,021	[1]	$ 182,095	[1]	196,699	[2]	$ 161,412	[2]
Impaired Financing Receivable, Interest Income, Accrual Method	1,025		981		3,025		2,469
Non Purchased Credit Impaired Loans and Leases | Real Estate Mortgage
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, with Related Allowance, Related Allowance	1,153				1,153				6,851
Total Impaired Loans and Leases	113,755				113,755				124,085
Impaired Financing Receivable, Unpaid Principal Balance	126,017				126,017				133,985
Impaired Financing Receivable, Average Recorded Investment	113,643	[1]	89,748	[1]	112,071	[2]	82,282	[2]
Impaired Financing Receivable, Interest Income, Accrual Method	878		865		2,643		2,162
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				0				0
Total Impaired Loans and Leases	5,764				5,764				7,257
Impaired Financing Receivable, Unpaid Principal Balance	5,762				5,762				7,259
Impaired Financing Receivable, Average Recorded Investment	5,764	[1]	8,606	[1]	5,764	[2]	7,842	[2]
Impaired Financing Receivable, Interest Income, Accrual Method	74		61		220		180
Non Purchased Credit Impaired Loans and Leases | Commercial
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, with Related Allowance, Related Allowance	15,012				15,012				17,912
Total Impaired Loans and Leases	94,328				94,328				103,718
Impaired Financing Receivable, Unpaid Principal Balance	132,611				132,611				138,136
Impaired Financing Receivable, Average Recorded Investment	89,212	[1]	83,319	[1]	78,462	[2]	70,884	[2]
Impaired Financing Receivable, Interest Income, Accrual Method	71		52		156		118
Non Purchased Credit Impaired Loans and Leases | Consumer
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, with Related Allowance, Recorded Investment	106				106				270
Impaired Financing Receivable, with Related Allowance, Unpaid Principal Balance	105				105				280
Impaired Financing Receivable, with Related Allowance, Related Allowance	17				17				170
Impaired Financing Receivable, with No Related Allowance, Recorded Investment	296				296				221
Impaired Financing Receivable, with No Related Allowance, Unpaid Principal Balance	368				368				292
Impaired Financing Receivable, with Related Allowance, Average Recorded Investment	106	[1]	346	[1]	106	[2]	330	[2]
Impaired Financing Receivable, with Related Allowance, Interest Income, Accrual Method	2		3		6		8
Impaired Financing Receivable, with No Related Allowance, Average Recorded Investment	296	[1]	76	[1]	296	[2]	74	[2]
Impaired Financing Receivable, with No Related Allowance, Interest Income, Accrual Method	0		0		0		1
Total Impaired Loans and Leases	402				402				491
Impaired Financing Receivable, Unpaid Principal Balance	473				473				572
Impaired Financing Receivable, Average Recorded Investment	402	[1]	422	[1]	402	[2]	404	[2]
Impaired Financing Receivable, Interest Income, Accrual Method	2		3		6		9
Cash Flow | Non Purchased Credit Impaired Loans and Leases | Commercial
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, with Related Allowance, Recorded Investment	31,114				31,114				51,272
Impaired Financing Receivable, with Related Allowance, Unpaid Principal Balance	40,068				40,068				52,910
Impaired Financing Receivable, with Related Allowance, Related Allowance	8,720				8,720				12,474
Impaired Financing Receivable, with No Related Allowance, Recorded Investment	2,559				2,559				2,852
Impaired Financing Receivable, with No Related Allowance, Unpaid Principal Balance	4,690				4,690				5,939
Impaired Financing Receivable, with Related Allowance, Average Recorded Investment	31,114	[1]	25,933	[1]	31,114	[2]	20,417	[2]
Impaired Financing Receivable, with Related Allowance, Interest Income, Accrual Method	2		9		5		26
Impaired Financing Receivable, with No Related Allowance, Average Recorded Investment	2,338	[1]	2,330	[1]	1,995	[2]	2,232	[2]
Impaired Financing Receivable, with No Related Allowance, Interest Income, Accrual Method	11		1		14		1
Asset Based | Non Purchased Credit Impaired Loans and Leases | Commercial
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, with Related Allowance, Recorded Investment	2,499				2,499				4,395
Impaired Financing Receivable, with Related Allowance, Unpaid Principal Balance	2,514				2,514				4,861
Impaired Financing Receivable, with Related Allowance, Related Allowance	422				422				2,144
Impaired Financing Receivable, with No Related Allowance, Recorded Investment	4,528				4,528				664
Impaired Financing Receivable, with No Related Allowance, Unpaid Principal Balance	6,479				6,479				1,652
Impaired Financing Receivable, with Related Allowance, Average Recorded Investment	2,372	[1]	2,730	[1]	2,079	[2]	2,278	[2]
Impaired Financing Receivable, with Related Allowance, Interest Income, Accrual Method	29		5		83		14
Impaired Financing Receivable, with No Related Allowance, Average Recorded Investment	1,501	[1]	2,535	[1]	1,171	[2]	1,828	[2]
Impaired Financing Receivable, with No Related Allowance, Interest Income, Accrual Method	29		37		54		77
Venture Capital Loans | Non Purchased Credit Impaired Loans and Leases | Commercial
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, with Related Allowance, Recorded Investment	20,039				20,039				5,821
Impaired Financing Receivable, with Related Allowance, Unpaid Principal Balance	22,377				22,377				5,880
Impaired Financing Receivable, with Related Allowance, Related Allowance	5,870				5,870				3,294
Impaired Financing Receivable, with No Related Allowance, Recorded Investment	2,647				2,647				5,866
Impaired Financing Receivable, with No Related Allowance, Unpaid Principal Balance	6,741				6,741				8,939
Impaired Financing Receivable, with Related Allowance, Average Recorded Investment	18,298	[1]	6,878	[1]	9,621	[2]	2,542	[2]
Impaired Financing Receivable, with Related Allowance, Interest Income, Accrual Method	0		0		0		0
Impaired Financing Receivable, with No Related Allowance, Average Recorded Investment	2,647	[1]	0	[1]	1,922	[2]	0	[2]
Impaired Financing Receivable, with No Related Allowance, Interest Income, Accrual Method	0		0		0		0
Equipment Finance Commercial Financing Receivable | Non Purchased Credit Impaired Loans and Leases | Commercial
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, with Related Allowance, Recorded Investment	0				0				1,524
Impaired Financing Receivable, with Related Allowance, Unpaid Principal Balance	0				0				4,636
Impaired Financing Receivable, with Related Allowance, Related Allowance	0				0				0
Impaired Financing Receivable, with No Related Allowance, Recorded Investment	30,942				30,942				31,324
Impaired Financing Receivable, with No Related Allowance, Unpaid Principal Balance	49,742				49,742				53,319
Impaired Financing Receivable, with Related Allowance, Average Recorded Investment	0	[1]	42,913	[1]	0	[2]	41,587	[2]
Impaired Financing Receivable, with Related Allowance, Interest Income, Accrual Method	0		0		0		0
Impaired Financing Receivable, with No Related Allowance, Average Recorded Investment	30,942	[1]	0	[1]	30,560	[2]	0	[2]
Impaired Financing Receivable, with No Related Allowance, Interest Income, Accrual Method	0		0		0		0
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	5,764				5,764				6,680
Impaired Financing Receivable, with No Related Allowance, Unpaid Principal Balance	5,762				5,762				6,680
Impaired Financing Receivable, with No Related Allowance, Average Recorded Investment	5,764	[1]	7,870	[1]	5,764	[2]	7,106	[2]
Impaired Financing Receivable, with No Related Allowance, Interest Income, Accrual Method	74		57		220		169
Residential Real Estate Construction Financing Receivable | Non Purchased Credit Impaired Loans and Leases | Real Estate Construction and Land
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, with Related Allowance, Recorded Investment	0				0				213
Impaired Financing Receivable, with Related Allowance, Unpaid Principal Balance	0				0				213
Impaired Financing Receivable, with Related Allowance, Related Allowance	0				0				0
Impaired Financing Receivable, with No Related Allowance, Recorded Investment	0				0				364
Impaired Financing Receivable, with No Related Allowance, Unpaid Principal Balance	0				0				366
Impaired Financing Receivable, with Related Allowance, Average Recorded Investment	0	[1]	736	[1]	0	[2]	736	[2]
Impaired Financing Receivable, with Related Allowance, Interest Income, Accrual Method	0		4		0		11
Commercial 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	14,716				14,716				63,325
Impaired Financing Receivable, with Related Allowance, Unpaid Principal Balance	15,536				15,536				65,031
Impaired Financing Receivable, with Related Allowance, Related Allowance	682				682				6,266
Impaired Financing Receivable, with No Related Allowance, Recorded Investment	92,295				92,295				44,557
Impaired Financing Receivable, with No Related Allowance, Unpaid Principal Balance	103,306				103,306				51,402
Impaired Financing Receivable, with Related Allowance, Average Recorded Investment	14,716	[1]	18,580	[1]	14,716	[2]	18,220	[2]
Impaired Financing Receivable, with Related Allowance, Interest Income, Accrual Method	214		262		634		781
Impaired Financing Receivable, with No Related Allowance, Average Recorded Investment	92,183	[1]	59,090	[1]	90,631	[2]	54,747	[2]
Impaired Financing Receivable, with No Related Allowance, Interest Income, Accrual Method	635		518		1,924		1,209
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	3,074				3,074				8,424
Impaired Financing Receivable, with Related Allowance, Unpaid Principal Balance	3,269				3,269				8,612
Impaired Financing Receivable, with Related Allowance, Related Allowance	471				471				585
Impaired Financing Receivable, with No Related Allowance, Recorded Investment	3,670				3,670				7,779
Impaired Financing Receivable, with No Related Allowance, Unpaid Principal Balance	3,906				3,906				$ 8,940
Impaired Financing Receivable, with Related Allowance, Average Recorded Investment	3,074	[1]	2,505	[1]	3,074	[2]	2,325	[2]
Impaired Financing Receivable, with Related Allowance, Interest Income, Accrual Method	14		15		41		42
Impaired Financing Receivable, with No Related Allowance, Average Recorded Investment	3,670	[1]	9,573	[1]	3,650	[2]	6,990	[2]
Impaired Financing Receivable, with No Related Allowance, Interest Income, Accrual Method	$ 15		$ 70		$ 44		$ 130

[1] For Non-PCI loans and leases reported as impaired at September 30, 2017 and 2016, amounts were calculated based on the period of time such loans and leases were impaired during the reported period.

[2] For Non-PCI loans and leases reported as impaired at September 30, 2017 and 2016, amounts were calculated based on the period of time such loans and leases were impaired during the reported period.