Stock Based Compensation (Details) (USD $)	0 Months Ended		3 Months Ended		9 Months Ended
	Jun. 27, 2013	Jun. 28, 2012	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012	Dec. 31, 2012
Options
Balance at beginning of period			166,075	177,967	162,825	162,825
Shares granted	5,000	9,000		2,500	5,000	11,500
Shares forfeited			(750)		(6,850)	(500)
Shares exercised			(2,500)		(9,792)	(1,299)
Balance at end of period			162,825	177,967	162,825	177,967
Weighted Average Exercise Price
Balance at beginning of period			$ 11.35	$ 11.26	$ 11.37	$ 11.37
Shares granted				$ 12.00	$ 12.84	$ 11.30
Shares forfeited			$ 10.77		$ 11.47	$ 10.77
Shares exercised			$ 10.42		$ 9.02	$ 8.54
Balance at end of period			$ 11.37	$ 11.26	$ 11.37	$ 11.26
Number of options exercisable							13,915
Weighted average exercise price of options exercisable							$ 14.79