Derivative Financial Instruments (Details) - Interest Rate Swap [Member] - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2016	Dec. 31, 2015
Long-term Borrowings [Member] | Cash Flow Hedges [Member]
Derivative [Line Items]
Notional Amount	$ 110,000	$ 110,000
Derivative Fair Value, Asset	0	0
Derivative Fair Value, Liability	7,391	5,071
Net Ineffectiveness Hedge Gains/(Losses)	0	0
Commercial Loan [Member] | Fair Value Hedges [Member]
Derivative [Line Items]
Notional Amount	21,250	21,250
Derivative Fair Value, Asset	0	94
Derivative Fair Value, Liability	847	95
Net Ineffectiveness Hedge Gains/(Losses)	$ 0	$ 0