Derivative Financial Instruments (Narrative)(Details) (USD $)	12 Months Ended
	Dec. 31, 2012 security	Dec. 31, 2011
Derivative Financial Instruments [Abstract]
Interest rate swap notional amount	$ 20,000,000
Number of interest rate swap contracts	3
Interest rate swap fair value	800,000	1,000,000
Cash collateral	1,400,000	1,400,000
Gain on derivative	185,000
Deferred tax asset on gain on derivative	$ 76,000
Cash flow hedge ineffectiveness	Interest rate swap agreements are entered into with counterparties that meet established credit standards and we believe that the credit risk inherent in these contracts is not significant as of December 31, 2012.