Fair Value Measurements (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Mar. 31, 2021	Dec. 31, 2020	Sep. 25, 2017
Liabilities, Fair Value Disclosure [Abstract]
Warrant liability	$ 96,536		$ 103,474
Fair Value, Recurring [Member]
Assets, Fair Value Disclosure [Abstract]
Cash equivalents - money market		$ 40	20,389
Total Assets		40	20,389
Liabilities, Fair Value Disclosure [Abstract]
Interest rate swap			(13,414)
Warrant liability		(96,536)	(103,474)
Total Liabilities		(107,416)	(116,888)
Carrying value, debt		1,497,800	1,479,100
Fair Value, Recurring [Member] | Level 1 [Member]
Assets, Fair Value Disclosure [Abstract]
Cash equivalents - money market		0	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		40	20,389
Convertible note hedge fair value				$ 56,100
Total Assets		40	20,389
Liabilities, Fair Value Disclosure [Abstract]
Interest rate swap		(10,880)	(13,414)
Warrant liability		0	(9,058)
Total Liabilities		(10,880)	(22,472)
Difference between fair value and carrying value, debt		48,200	70,800
Fair Value, Recurring [Member] | Level 3 [Member]
Assets, Fair Value Disclosure [Abstract]
Cash equivalents - money market		0	0
Total Assets		0	0
Liabilities, Fair Value Disclosure [Abstract]
Interest rate swap		0	0
Warrant liability		(96,536)	(94,416)
Total Liabilities		(96,536)	$ (94,416)
Fair Value, Recurring [Member] | Total [Member]
Liabilities, Fair Value Disclosure [Abstract]
Interest rate swap		(10,880)
Amazon Warrant C [Member] [Member]
Liabilities, Fair Value Disclosure [Abstract]
Warrant liability		$ (96,500)