Earnings Per Common Share (Details) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Numerators [Abstract]
Net income	$ 4,664	$ 5,105	$ 6,501	$ 9,897
Denominators [Abstract]
Weighted average common shares - basic (in shares)	12,612,389	11,671,388	12,597,381	11,644,698
Dilutive effect of restricted stock (in shares)	107,983	162,115	100,566	165,274
Weighted average common shares - diluted (in shares)	12,720,372	11,833,503	12,697,947	11,809,972
Basic earnings per share (in dollars per share)	$ 0.37	$ 0.44	$ 0.52	$ 0.85
Diluted earnings per share (in dollars per share)	$ 0.37	$ 0.43	$ 0.51	$ 0.84