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 (benefit)	$ (402)	$ 1,337	$ 1,039	$ 3,742
Effective tax rate (as a percent)	45.00%	37.70%	36.50%	36.40%