Leases - Narrative (Details) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021 USD ($) ft²	Jun. 30, 2020 USD ($)	Jun. 30, 2021 USD ($) ft²	Jun. 30, 2020 USD ($)	Dec. 31, 2020 USD ($)
Lessee, Lease, Description [Line Items]
Total plant space (in square feet) | ft²	534,894		534,894
Rent expense	$ 3,800	$ 1,900	$ 7,000	$ 4,000
Financing obligations, non-current	$ 459,887		$ 459,887		$ 459,981
Minimum
Lessee, Lease, Description [Line Items]
Remaining lease term	1 year		1 year
Maximum
Lessee, Lease, Description [Line Items]
Remaining lease term	15 years		15 years