Leases - Supplemental Cash Flow Information (Details) - USD ($) $ in Thousands		12 Months Ended
	Jan. 01, 2019	Dec. 31, 2019
Lessee, Lease, Description [Line Items]
Operating Lease, Payments		$ 15,143
Finance Lease, Interest Payment on Liability		1,317
Right-of-Use Asset Obtained in Exchange for Operating Lease Liability	$ 34,000	65,525
Right-of-Use Asset Obtained in Exchange for Finance Lease Liability		$ 2,658
Clean Earth
Lessee, Lease, Description [Line Items]
Right-of-Use Asset Obtained in Exchange for Operating Lease Liability	$ 25,800