Income Taxes - Components of Income Tax Expense (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Current tax provision:
Federal		$ 5,640	$ (1,048)	$ (87,961)
State		981	388	(8,429)
Foreign		4,641	4,895	5,032
Total current		11,262	4,235	(91,358)
Deferred tax provision:
Federal		60	(1,570)	154,817
State		40	(210)	18,902
Foreign		284	(768)	187
Total deferred		384	(2,548)	173,906
Total income tax expense	$ 5,300	$ 11,646	$ 1,687	$ 82,548