Commitments and Contingencies - Rental Income (Details) - USD ($) $ in Thousands	3 Months Ended						4 Months Ended		12 Months Ended
	Sep. 07, 2019	Jun. 15, 2019	Mar. 23, 2019	Sep. 08, 2018	Jun. 16, 2018	Mar. 24, 2018	Dec. 28, 2019	Dec. 29, 2018	Dec. 28, 2019
Lessor, Lease, Description [Line Items]
Rental income	$ 5,657	$ 5,762	$ 3,548	$ 0	$ 0	$ 0	$ 7,696	$ 0	$ 22,663
Environmental Services
Lessor, Lease, Description [Line Items]
Rental income									22,408
Oil Business
Lessor, Lease, Description [Line Items]
Rental income									255
Parts Cleaning
Lessor, Lease, Description [Line Items]
Rental income									22,408
Parts Cleaning | Environmental Services
Lessor, Lease, Description [Line Items]
Rental income									22,408
Parts Cleaning | Oil Business
Lessor, Lease, Description [Line Items]
Rental income									0
Railcars
Lessor, Lease, Description [Line Items]
Rental income									213
Railcars | Environmental Services
Lessor, Lease, Description [Line Items]
Rental income									0
Railcars | Oil Business
Lessor, Lease, Description [Line Items]
Rental income									213
Property
Lessor, Lease, Description [Line Items]
Rental income									42
Property | Environmental Services
Lessor, Lease, Description [Line Items]
Rental income									0
Property | Oil Business
Lessor, Lease, Description [Line Items]
Rental income									$ 42