Stock Based Compensation (Details) (USD $)	1 Months Ended		3 Months Ended		6 Months Ended
	Jun. 30, 2011	Mar. 31, 2011	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011
Activity under the 1998 and 2010 Omnibus Stock Incentive Plan , Options
Balance at beginning of period (in shares)			167,746	92,000	168,266	88,831
Granted (in shares)	96,000	5,000	9,000	96,000	9,000	101,000
Exercised (in shares)			(1,279)	(12,578)	(1,299)	(14,409)
Forfeited (in shares)				(741)	(500)	(741)
Balance at end of period (in shares)	174,681	92,000	175,467	174,681	175,467	174,681
Options exercisable at June 30, 2012	7,289			7,289		7,289
1998 and 2010 Omnibus Stock Incentive Plan , Weighted Average Exercise Price
Balance at the beginning of period (in dollars per share)			$ 11.23	$ 11.59	$ 11.23	$ 11.51
Granted (in dollars per share)			$ 11.11	$ 10.42	$ 11.11	$ 10.48
Exercised (in dollars per share)			$ 8.54	$ 8.18	$ 8.54	$ 8.17
Forfeited (in dollars per share)				$ 8.11	$ 10.77	$ 8.11
Balance at end of period (in dollars per share)	$ 11.21	$ 11.59	$ 11.25	$ 11.21	$ 11.25	$ 11.21
Options exercisable at the end of period (in dollars per share)	$ 8.54			$ 8.54		$ 8.54