Earnings Per Common Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Numerator:
Net income	$ 4,255	$ 4,122	$ 11,536	$ 12,818
Earnings allocated to participating securities	(82)	(71)	(208)	(213)
Numerator for earnings per common share	$ 4,173	$ 4,051	$ 11,328	$ 12,605
Denominator:
Denominator for basic earnings per common share	18,288,927	18,670,407	18,716,697	18,701,971
Effect of dilutive securities:
Stock compensation	256,687	176,154	195,090	161,553
Denominator for diluted earnings per common share	18,545,614	18,846,561	18,911,787	18,863,524
Earnings per common share:
Basic	$ 0.23	$ 0.22	$ 0.61	$ 0.67
Diluted	$ 0.23	$ 0.22	$ 0.60	$ 0.67