Leases - Narrative (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2021 USD ($) ft²	Mar. 31, 2020 USD ($)	Dec. 31, 2020 USD ($)
Lessee, Lease, Description [Line Items]
Total plant space (in square feet) | ft²	534,894
Financing obligations, non-current	$ 461,468		$ 459,981
Operating and Short-Term Lease, Cost	$ 3,100	$ 2,100
Minimum
Lessee, Lease, Description [Line Items]
Remaining lease term	1 year
Maximum
Lessee, Lease, Description [Line Items]
Remaining lease term	15 years