Fair Value Measurements (Details) - USD ($)	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2021	May 10, 2018	Sep. 25, 2017
Liabilities, Fair Value Disclosure [Abstract]
Warrant liability	$ 103,474,000	$ 915,000
Fair Value, Recurring [Member]
Assets, Fair Value Disclosure [Abstract]
Cash equivalents - money market	20,389,000	30,042,000
Derivative Asset	0
Total Assets	20,389,000	30,042,000
Liabilities, Fair Value Disclosure [Abstract]
Interest rate swap	(13,414,000)
Warrant liability	(103,474,000)	(915,000)
Total Liabilities	(116,888,000)	(4,518,000)
Carrying value, debt	1,479,100,000	1,299,400,000
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	20,389,000	30,042,000
Derivative Asset	0
Convertible note hedge fair value			$ 50,600,000	$ 56,100,000
Total Assets	20,389,000	30,042,000
Liabilities, Fair Value Disclosure [Abstract]
Interest rate swap	(13,414,000)	(3,603,000)
Note conversion obligation fair value			$ 51,300,000	$ 57,400,000
Warrant liability	(9,058,000)	0
Total Liabilities	(22,472,000)	(3,603,000)
Difference between fair value and carrying value, debt	70,800,000	37,100,000
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	(94,416,000)	(915,000)
Total Liabilities	(94,416,000)	(915,000)
Fair Value, Recurring [Member] | Total [Member]
Liabilities, Fair Value Disclosure [Abstract]
Interest rate swap		(3,603,000)
Amazon Warrant C [Member] [Member]
Liabilities, Fair Value Disclosure [Abstract]
Warrant liability	(103,500,000)	$ (900,000)
Fair value warrants issued	$ 15.49
Amazon Warrant C [Member] [Member] | Measurement Input, Risk Free Interest Rate [Member]
Liabilities, Fair Value Disclosure [Abstract]
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Risk Free Interest Rate	0.40%
Amazon Warrant C [Member] [Member] | Measurement Input, Price Volatility [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Volatility Rate	40.00%