Income Taxes - Schedule of Components of Income Taxes (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Income Tax [Line Items]
Current tax provision	$ 8,030	$ 4,955	$ 634
Deferred tax provision (benefit):	23,573	(173,019)	(10,038)
Income tax provision (benefit)	31,603	(168,064)	(9,404)
United States Federal
Income Tax [Line Items]
Current tax provision	444	(1,657)	0
Deferred tax provision (benefit):	(9,315)	(172,873)	5,785
United States And Local
Income Tax [Line Items]
Current tax provision	2	98	(1,520)
Deferred tax provision (benefit):	(2,990)	(7,775)	(3,550)
Foreign
Income Tax [Line Items]
Current tax provision	7,584	6,514	2,154
Deferred tax provision (benefit):	$ 35,878	$ 7,629	$ (12,273)