Loans and Leases (Details 6)		12 Months Ended
		Dec. 31, 2016 USD ($) Contract		Dec. 31, 2015 USD ($) Contract		Dec. 31, 2014 USD ($) Contract
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Number of Contracts | Contract		54	[1]	97	[2]	72	[3]
Financing Receivable, Modifications, Pre-Modification Recorded Investment		$ 100,161,000	[1]	$ 175,728,000	[2]	$ 41,030,000	[3]
Financing Receivable, Modifications, Post-Modification Recorded Investment		$ 89,443,000	[1]	$ 174,858,000	[2]	$ 34,457,000	[3]
Financing Receivable, Modifications, Subsequent Default, Number of Contracts | Contract	[4]	4	[1]	3	[2]	3	[3]
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	[4]	$ 6,502,000	[1]	$ 2,825,000	[2]	$ 1,589,000	[3]
Financing Receivables, Impaired, Troubled Debt Restructuring, Write-down		$ 0		$ 96,900		$ 129,000
Mortgages [Member] | Commercial Real Estate [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Number of Contracts		12		21		14
Financing Receivable, Modifications, Pre-Modification Recorded Investment		$ 13,833,000		$ 43,536,000		$ 14,659,000
Financing Receivable, Modifications, Post-Modification Recorded Investment		$ 6,099,000		$ 43,012,000		$ 14,660,000
Financing Receivable, Modifications, Subsequent Default, Number of Contracts	[4]	0		2		1
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	[4]	$ 0		$ 2,670,000		$ 55,000
Mortgages [Member] | Residential Real Estate [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Number of Contracts | Contract		10		18		11
Financing Receivable, Modifications, Pre-Modification Recorded Investment		$ 7,091,000		$ 3,128,000		$ 4,794,000
Financing Receivable, Modifications, Post-Modification Recorded Investment		$ 6,439,000		$ 2,961,000		$ 4,794,000
Financing Receivable, Modifications, Subsequent Default, Number of Contracts	[4]	2		1		0
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	[4]	$ 5,000,000		$ 155,000		$ 0
Real Estate Construction [Member] | Residential Real Estate Construction Financing Receivable [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Number of Contracts | Contract		1
Financing Receivable, Modifications, Pre-Modification Recorded Investment		$ 1,245,000
Financing Receivable, Modifications, Post-Modification Recorded Investment		$ 1,245,000
Financing Receivable, Modifications, Subsequent Default, Number of Contracts	[4]	0
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	[4]	$ 0
Real Estate Construction [Member] | Commercial Real Estate Construction Loan Receivable [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Number of Contracts | Contract						4
Financing Receivable, Modifications, Pre-Modification Recorded Investment						$ 5,507,000
Financing Receivable, Modifications, Post-Modification Recorded Investment						$ 4,965,000
Financing Receivable, Modifications, Subsequent Default, Number of Contracts	[4]			0		0
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	[4]			$ 0		$ 0
Commercial Portfolio Segment [Member] | Cash Flow [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Number of Contracts | Contract		14		25		13
Financing Receivable, Modifications, Pre-Modification Recorded Investment		$ 30,788,000		$ 2,718,000		$ 2,717,000
Financing Receivable, Modifications, Post-Modification Recorded Investment		$ 30,788,000		$ 2,539,000		$ 2,717,000
Financing Receivable, Modifications, Subsequent Default, Number of Contracts | Contract	[4]	0				1
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	[4]	$ 0				$ 1,144,000
Commercial Portfolio Segment [Member] | Asset Based [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Number of Contracts | Contract		5		13		22
Financing Receivable, Modifications, Pre-Modification Recorded Investment		$ 2,158,000		$ 8,400,000		$ 12,368,000
Financing Receivable, Modifications, Post-Modification Recorded Investment		$ 2,158,000		$ 8,400,000		$ 6,336,000
Financing Receivable, Modifications, Subsequent Default, Number of Contracts | Contract	[4]	2		0		1
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	[4]	$ 1,502,000		$ 0		$ 390,000
Commercial Portfolio Segment [Member] | Equipment Finance Commercial Financing Receivable [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Number of Contracts | Contract		7		10		1
Financing Receivable, Modifications, Pre-Modification Recorded Investment		$ 44,196,000		$ 93,868,000		$ 518,000
Financing Receivable, Modifications, Post-Modification Recorded Investment		$ 42,572,000		$ 93,868,000		$ 518,000
Financing Receivable, Modifications, Subsequent Default, Number of Contracts | Contract	[4]	0		0		0
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	[4]	$ 0		$ 0		$ 0
Consumer Portfolio Segment [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Number of Contracts | Contract		5		2		7
Financing Receivable, Modifications, Pre-Modification Recorded Investment		$ 850,000		$ 197,000		$ 467,000
Financing Receivable, Modifications, Post-Modification Recorded Investment		$ 142,000		$ 197,000		$ 467,000
Commercial Portfolio Segment [Member] | Commercial Portfolio Segment [Member] | Cash Flow [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Subsequent Default, Number of Contracts | Contract	[4]			0
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	[4]			$ 0
Commercial Real Estate Construction Loan Receivable [Member] | Real Estate Construction [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Number of Contracts | Contract				8
Financing Receivable, Modifications, Pre-Modification Recorded Investment				$ 23,881,000
Financing Receivable, Modifications, Post-Modification Recorded Investment				$ 23,881,000
Consumer Portfolio Segment [Member] | Consumer Portfolio Segment [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Subsequent Default, Number of Contracts | Contract	[4]	0		0		0
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	[4]	$ 0		$ 0		$ 0

[1] Represents the balance at December 31, 2016, and there were no

[2] Represents the balance at December 31, 2015, and is net of charge-offs of

[3] Represents the balance at December 31, 2014, and is net of charge-offs of $129,000.

[4] The population of defaulted restructured loans for the period indicated includes only those loans restructured during the preceding 12-month period. For example, for the year ended December 31, 2016, the population of defaulted restructured loans includes only those loans restructured after December 31, 2015. The table excludes defaulted troubled restructurings in those classes for which the recorded investment was zero at the end of the period.