Severance and Other Charges, net - Summary of Severance and Other Charges (Credits), net (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Restructuring and Related Activities [Abstract]
Severance and other costs	$ 3,444,000	$ 1,243,000	$ 8,776,000	$ 2,225,000
Fixed asset impairments and retirements	105,000	3,979,000	15,584,000	4,045,000
Inventory write-offs	0	0	368,000	222,000
Intangible asset impairments	0	0	4,708,000	0
Severance and other charges, net	$ 3,549,000	$ 5,222,000	$ 29,436,000	$ 6,492,000