Loans, Major Classifications of Loans, Net of Income and Deferred Loan Origination Cost (Details) $ in Thousands	9 Months Ended
	Sep. 30, 2016 USD ($) Segment	Dec. 31, 2015 USD ($)
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	$ 2,931,299	$ 2,873,961
Number of portfolio segments | Segment	9
Loans held for sale [Abstract]
Loans held for sale	$ 2,075	1,172
Commercial [Member] | Construction [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	68,275	78,020
Commercial [Member] | Real Estate [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	1,083,640	1,052,919
Commercial [Member] | Equipment Lease Financing [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	6,242	8,514
Commercial [Member] | Other [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	354,984	358,898
Residential [Member] | Construction [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	55,412	61,750
Residential [Member] | Real Estate [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	706,028	707,874
Residential [Member] | Home Equity [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	89,467	89,450
Consumer [Member] | Consumer Direct [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	131,815	126,406
Consumer [Member] | Consumer Indirect [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	$ 435,436	$ 390,130