Earnings Per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Numerator:
Net income	$ 5,818	$ 5,412	$ 11,097	$ 7,281
Earnings allocated to participating securities	(104)	(110)	(193)	(131)
Numerator for earnings per common share	$ 5,714	$ 5,302	$ 10,904	$ 7,150
Denominator:
Denominator for basic earnings per common share	18,354,631	18,574,300	18,362,549	18,916,686
Effect of dilutive securities:
Stock compensation	138,108	102,261	136,485	18,918
Denominator for diluted earnings per common share	18,492,739	18,676,561	18,499,034	18,935,604
Earnings per common share:
Basic	$ 0.31	$ 0.29	$ 0.59	$ 0.38
Diluted	$ 0.31	$ 0.28	$ 0.59	$ 0.38