Income Taxes - Income Tax Rate Reconciliation (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Income Tax Disclosure [Abstract]
Computed “expected” tax provision	$ (60,433)	$ (92,018)	$ (20,719)
Change in income taxes resulting from:
State income taxes, net of Federal income tax	(7,402)	(11,667)	(537)
Change in state income tax rate, net of Federal income tax	728	(16)	(4,714)
Foreign income tax (benefit) provision	(2,623)	(1,658)	2,206
Deduction for domestic production activities	0	0	(2,527)
Stock compensation	4,565	2,480	(1,316)
R&D tax credits	(1,428)	(750)	(1,200)
Nondeductible acquisition fees	0	(1,165)	1,974
Uncertain tax positions	(47,357)	7,935	15,650
Federal rate change	0	(3,027)	(26,902)
Lapse of statute of limitations	(16,034)	570	1,561
Taxes receivable true up	2,651	0	0
Deferred tax adjustment	17,578	0	0
162(m) Officers Compensation Limitation	340	1,483	0
Other expense, net	408	934	1,201
Valuation allowance change	47,999	60,626	675
Income tax (benefit)	$ (61,008)	$ (36,273)	$ (34,648)