Goodwill and Other Intangible Assets - Goodwill Balances (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 28, 2019	Dec. 29, 2018	Dec. 30, 2017
Goodwill [Line Items]
Gross carrying amount beginning balance	$ 36,949	$ 38,075	$ 35,532
Accumulated impairment loss	(3,952)	(3,952)	(3,952)
Goodwill [Roll Forward]
Goodwill beginning balance	34,123	31,580
Acquisitions	0	2,543
Measurement period adjustments	0
Goodwill ending balance	32,997	34,123
Oil Business
Goodwill [Line Items]
Gross carrying amount beginning balance	3,952	3,952	3,952
Accumulated impairment loss	(3,952)	(3,952)	(3,952)
Goodwill [Roll Forward]
Goodwill beginning balance	0	0
Acquisitions	0	0
Measurement period adjustments	0
Goodwill ending balance	0	0
Environmental Services
Goodwill [Line Items]
Gross carrying amount beginning balance	32,997	34,123	31,580
Accumulated impairment loss	0	0	$ 0
Goodwill [Roll Forward]
Goodwill beginning balance	34,123	31,580
Acquisitions	639	2,543
Measurement period adjustments	(1,765)
Goodwill ending balance	$ 32,997	$ 34,123