Income Taxes - Summary of components of provision (benefit) for income taxes (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Current provision (benefit):
Federal	$ (74,841)	$ (3,548)	$ 13,708
State	2,200	(3,185)	3,932
Foreign	1,247	2,968	6,843
Deferred provision (benefit):
Federal	(16,376)	(26,493)	23,203
State	(9,469)	4,268	(1,808)
Total income tax (benefit) provision	$ (97,239)	$ (25,990)	$ 45,878