Income Taxes (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
INCOME TAXES
Income tax expense	$ 2,357	$ 2,614	$ 5,048	$ 4,589
Effective tax rate (as a percent)	36.30%	35.90%	36.50%	36.00%