Derivative Financial Instruments (Balance sheet category and fair values of derivative instruments (cash flow hedges)) (Details) (Other Liabilities, Interest Rate Swap, USD $) In Thousands, unless otherwise specified	Mar. 31, 2015	Dec. 31, 2014
Interest Rate Swap
Derivatives, Fair Value [Line Items]
Notional Amount	$ 10,020	$ 10,369
Fair Value	(209)	(248)
Receive Rate	2.926%	2.915%
Weighted Average Pay Rate	5.14%	5.14%
Interest Rate Swap
Derivatives, Fair Value [Line Items]
Notional Amount	25,000	25,000
Fair Value	(910)	(534)
Receive Rate	0.271%	0.243%
Weighted Average Pay Rate	2.255%	2.255%
Interest Rate Swap
Derivatives, Fair Value [Line Items]
Notional Amount	20,000	20,000
Fair Value	(1,001)	(1,046)
Receive Rate	0.262%	0.234%
Weighted Average Pay Rate	3.22%	3.22%
Interest Rate Swap
Derivatives, Fair Value [Line Items]
Notional Amount	20,000	20,000
Fair Value	(1,932)	(1,748)
Receive Rate	0.254%	0.232%
Weighted Average Pay Rate	3.355%	3.355%
Interest Rate Swap
Derivatives, Fair Value [Line Items]
Notional Amount	10,000	10,000
Fair Value	(143)	(35)
Receive Rate	0.269%	0.255%
Weighted Average Pay Rate	1.674%	1.674%
Interest Rate Swap
Derivatives, Fair Value [Line Items]
Notional Amount	10,000	10,000
Fair Value	(141)	(35)
Receive Rate	0.271%	0.243%
Weighted Average Pay Rate	1.658%	1.658%
Interest Rate Swap
Derivatives, Fair Value [Line Items]
Notional Amount	20,000
Fair Value	(93)
Receive Rate	1.632%
Weighted Average Pay Rate	2.39%
Interest Rate Swap
Derivatives, Fair Value [Line Items]
Notional Amount	20,000
Fair Value	$ (107)
Receive Rate	1.474%
Weighted Average Pay Rate	2.352%