Special Charges - General Information (Details) $ in Thousands	3 Months Ended	9 Months Ended
	Sep. 30, 2020 USD ($)	Sep. 30, 2020 USD ($)
Restructuring Charges
Restructuring charges	$ 2,424	$ 2,507
Asset Impairment Charges
Impairment	14,175	22,401
Employee severance and termination benefits
Restructuring Charges
Restructuring charges	2,001	2,001
Lease shutdown costs
Restructuring Charges
Restructuring charges	423	506
Transformation Initiative, 2020
Asset Impairment Charges
Impairment	14,200	22,400
Restructuring and Related Cost, Expected Cost
Restructuring and related cost, expected cost	35,000	35,000
Transformation Initiative, 2020 | Employee severance and termination benefits
Restructuring Charges
Restructuring charges	2,000	2,000
Transformation Initiative, 2020 | Lease shutdown costs
Restructuring Charges
Restructuring charges	$ 400	$ 500