Stockholders' Equity (Details) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Net income:
Net income	$ 3,290	$ 2,863	$ 8,865	$ 10,227
Less: Dividends and undistributed earnings allocated to participating securities	(41)	(37)	(110)	(135)
Net income allocated to common shareholders	$ 3,249	$ 2,826	$ 8,755	$ 10,092
Basic:
Weighted average common shares outstanding (in shares)	16,163,205	15,149,292	15,485,086	15,301,868
Less: Restricted stock awards (in shares)	(204,992)	(194,405)	(187,828)	(177,911)
Total basic weighted average common shares outstanding (in shares)	15,958,213	14,954,887	15,297,258	15,123,957
Diluted:
Basic weighted average common shares outstanding (in shares)	15,958,213	14,954,887	15,297,258	15,123,957
Incremental shares from stock options (in shares)	10,854	13,784	11,983	14,266
Total diluted weighted average common shares outstanding (in shares)	15,969,067	14,968,671	15,309,241	15,138,223