Derivative Financial Instruments (Balance Sheet Category and Fair Values of Derivative Insturments (Cash Flow Hedges)) (Details) (Other Liabilities, USD $) In Thousands, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
Interest Rate Swap 1
Derivatives, Fair Value [Line Items]
Notional Amount	$ 13,002	$ 14,221
Fair Value	(711)	(725)
Receive Rate	2.961%	3.035%
Weighted Average Pay Rate	5.14%	5.14%
Interest Rate Swap 2
Derivatives, Fair Value [Line Items]
Notional Amount	25,000	25,000
Fair Value	(708)	(1,032)
Receive Rate	0.308%	0.559%
Weighted Average Pay Rate	2.58%	2.58%
Interest Rate Swap 3
Derivatives, Fair Value [Line Items]
Notional Amount	20,000	20,000
Fair Value	(2,186)	(2,064)
Receive Rate	0.311%	0.527%
Weighted Average Pay Rate	3.22%	3.22%
Interest Rate Swap 4
Derivatives, Fair Value [Line Items]
Notional Amount	20,000	20,000
Fair Value	$ (3,020)	$ (2,584)
Receive Rate	0.351%	0.384%
Weighted Average Pay Rate	3.355%	3.355%