Income Taxes (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Income Taxes
Income tax (benefit)	$ (4,101)	$ (838)	$ (10,681)	$ (4,107)
Effective tax rate (as a percent)			29.40%	10.10%
Tax (benefit) based on estimated effective tax rate for the full year			$ (5,995)
Income tax benefit, Tax windfall			$ (4,072)	$ (4,451)
Offset by tax expense based on estimated annual effective tax rate expected				$ 345