Income Taxes - Summary of components of provision (benefit) for income taxes (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Current provision (benefit):
Federal	$ (3,548)	$ 13,708	$ 95,995
State	(3,185)	3,932	13,966
Foreign	2,968	6,843	2,953
Deferred provision (benefit):
Federal	(26,493)	23,203	(39,710)
State	4,268	(1,808)	(2,899)
Total income tax (benefit) provision	$ (25,990)	$ 45,878	$ 70,305