Income Taxes (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Income Taxes
Income tax benefit	$ (3,367)	$ (4,041)
Effective tax rate (as a percent)	18.90%	26.90%
Tax benefit based on estimated effective tax rate for the full year	$ 3,031	$ 2,200
Income tax benefit, Tax windfall	$ 336	$ (1,061)