Retirement Plan (Details) (USD $)	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011	Dec. 31, 2011
Retirement Plan (Textual) [Abstract]
Retirement benefits plan, liability	$ 2,020,000		$ 2,020,000		$ 1,949,000
Retirement benefits plan, expense	$ 56,000	$ 49,000	$ 168,000	$ 148,000