Derivative Financial Instruments (Balance sheet category and fair values of derivative instruments (cash flow hedges)) (Details) - Other Liabilities - Interest Rate Swap - USD ($) $ in Thousands	Mar. 31, 2016	Dec. 31, 2015
Derivatives, Fair Value [Line Items]
Notional Amount	$ 8,580	$ 8,947
Fair Value	$ (14)	$ (57)
Receive Rate	3.182%	3.152%
Weighted Average Pay Rate	5.14%	5.14%
Notional Amount	$ 25,000	$ 25,000
Fair Value	$ (1,374)	$ (713)
Receive Rate	0.642%	0.526%
Weighted Average Pay Rate	2.255%	2.255%
Notional Amount	$ 20,000	$ 20,000
Fair Value	$ (507)	$ (600)
Receive Rate	0.635%	0.414%
Weighted Average Pay Rate	3.22%	3.22%
Notional Amount	$ 20,000	$ 20,000
Fair Value	$ (1,891)	$ (1,582)
Receive Rate	0.617%	0.323%
Weighted Average Pay Rate	3.355%	3.355%
Notional Amount	$ 10,000	$ 10,000
Fair Value	$ (223)	$ (83)
Receive Rate	0.63%	0.603%
Weighted Average Pay Rate	1.674%	1.674%
Notional Amount	$ 10,000	$ 10,000
Fair Value	$ (219)	$ (83)
Receive Rate	0.642%	0.526%
Weighted Average Pay Rate	1.658%	1.658%
Notional Amount	$ 20,000	$ 20,000
Fair Value	$ (1,044)	$ (146)
Receive Rate	0.00%	0.00%
Weighted Average Pay Rate	2.39%	2.39%
Notional Amount	$ 20,000	$ 20,000
Fair Value	$ (1,085)	$ (176)
Receive Rate	0.00%	0.00%
Weighted Average Pay Rate	2.352%	2.352%