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Loans (Loan Portfolio) (Details) - USD ($) $ in Thousands	Sep. 30, 2015	Dec. 31, 2014
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, Gross	$ 2,005,425	$ 1,881,071
Net Deferred Loan Costs (Fees)	30,811	30,931
Loans, Net	2,036,236	1,912,002
Allowance for loan losses	(26,455)	(27,637)
Total loans, net	2,009,781	1,884,365
Commercial Business [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, Gross	297,640	267,377
Net Deferred Loan Costs (Fees)	236	32
Loans, Net	297,876	267,409
Commercial Mortgage [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, Gross	549,911	476,407
Net Deferred Loan Costs (Fees)	(1,382)	(1,315)
Loans, Net	548,529	475,092
Residential Mortgage [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, Gross	96,298	100,241
Net Deferred Loan Costs (Fees)	(19)	(140)
Loans, Net	96,279	100,101
Home Equity [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, Gross	401,103	379,774
Net Deferred Loan Costs (Fees)	7,531	6,841
Loans, Net	408,634	386,615
Consumer Indirect [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, Gross	641,453	636,357
Net Deferred Loan Costs (Fees)	24,261	25,316
Loans, Net	665,714	661,673
Other Consumer [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, Gross	19,020	20,915
Net Deferred Loan Costs (Fees)	184	197
Loans, Net	$ 19,204	$ 21,112

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Amount of allowance to cover probable credit losses on loans and leases. Includes carryover of or adjustments to the allowance for loan losses in connection with business combinations. Excludes allowance for loans and leases covered under loss sharing agreements.

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Amount of deferred interest and fee income, unamortized costs incurred to originate loans and leases, unamortized loan commitments and loan syndication fees, and premiums over or discounts from face amounts of acquired loans. Excludes amounts for loans and leases covered under loss sharing agreements.

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Amount before allowance of loans and leases held in portfolio, including but not limited to, commercial and consumer loans. Includes deferred interest and fees, undisbursed portion of loan balance, unamortized costs and premiums and discounts from face amounts. Excludes loans and leases covered under loss sharing agreements.

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Amount after allowance and deduction of deferred interest and fees, unamortized costs and premiums and discounts from face amounts, of loans and leases held in portfolio, including but not limited to, commercial and consumer loans. Excludes loans and leases covered under loss sharing agreements and loans held for sale.

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