Fair Value Measurements (Details) - USD ($) $ in Thousands	Jun. 30, 2020	Dec. 31, 2019	May 10, 2018	Sep. 25, 2017
Liabilities, Fair Value Disclosure [Abstract]
Warrant liability	$ 375,538	$ 383,073
Fair Value, Recurring [Member]
Assets, Fair Value Disclosure [Abstract]
Cash equivalents - money market	835	1,129
Derivative Asset		111
Total Assets	835	1,240
Liabilities, Fair Value Disclosure [Abstract]
Interest rate swap		(8,237)
Warrant liability	(375,538)	(383,073)
Total Liabilities	(393,879)	(391,310)
Carrying value, debt	1,519,300	1,484,400
Fair Value, Recurring [Member] | Level 1 [Member]
Assets, Fair Value Disclosure [Abstract]
Cash equivalents - money market	0	0
Derivative Asset		0
Total Assets	0	0
Liabilities, Fair Value Disclosure [Abstract]
Interest rate swap	0	0
Warrant liability	0	0
Total Liabilities	0	0
Fair Value, Recurring [Member] | Level 2 [Member]
Assets, Fair Value Disclosure [Abstract]
Cash equivalents - money market	835	1,129
Derivative Asset		111
Convertible note hedge fair value			$ 50,600	$ 56,100
Total Assets	835	1,240
Liabilities, Fair Value Disclosure [Abstract]
Interest rate swap	(18,341)	(8,237)
Note conversion obligation fair value			$ 51,300	$ 57,400
Warrant liability	(329,895)	(340,767)
Total Liabilities	(348,236)	(349,004)
Difference between fair value and carrying value, debt	(18,000)	(2,700)
Fair Value, Recurring [Member] | Level 3 [Member]
Assets, Fair Value Disclosure [Abstract]
Cash equivalents - money market	0	0
Derivative Asset		0
Total Assets	0	0
Liabilities, Fair Value Disclosure [Abstract]
Interest rate swap	0	0
Warrant liability	(45,643)	(42,306)
Total Liabilities	(45,643)	$ (42,306)
Fair Value, Recurring [Member] | Total [Member]
Liabilities, Fair Value Disclosure [Abstract]
Interest rate swap	(18,341)
Amazon Warrant AB [Member]
Liabilities, Fair Value Disclosure [Abstract]
Warrant liability	(187,300)
Amazon Warrant C [Member] [Member]
Liabilities, Fair Value Disclosure [Abstract]
Warrant liability	$ (188,200)