Summary of Significant Accounting Policies - (Gain) Loss on Disposal/Write-Down of Property, Plant and Equipment, Net (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Accumulated Other Comprehensive Income (Loss) [Line Items]
(Gain) loss on disposal/write-down of property, plant and equipment, net	$ (935,000)	$ (75,840,000)	$ (134,321,000)	$ (78,170,000)
Facilities In The United Kingdom
Accumulated Other Comprehensive Income (Loss) [Line Items]
Sale and sale-leaseback transactions		$ 76,400,000	$ 127,400,000	$ 76,400,000
Number Of Sale Lease back Properties			5	2