Segment Information (Tables)

12 Months Ended

Dec. 28, 2019

Segment Reporting [Abstract]

Reconciliation of Operating Profit (Loss) from Segments to Consolidated

Segment results for the fiscal years ended December 28, 2019, December 29, 2018, and December 30, 2017 were as follows:

		For the Fiscal Years Ended,
		December 28, 2019
(thousands)		Environmental Services		Oil Business		Corporate and Eliminations		Consolidated
Revenues
	Service revenues	$	236,530	$	13,961	$	—	$	250,491
	Product revenues	43,605		127,668		—		171,273
	Rental income	22,408		255		—		22,663
Total revenues		$	302,543	$	141,884	$	—	$	444,427
Operating expenses
	Operating costs	219,040		130,563		—		349,603
	Operating depreciation and amortization	7,768		6,656		—		14,424
Profit before corporate selling, general, and administrative expenses		$	75,735	$	4,665	$	—	$	80,400
Selling, general, and administrative expenses						50,224		50,224
Depreciation and amortization from SG&A						3,825		3,825
Total selling, general, and administrative expenses						$	54,049	$	54,049
Other expense - net						13,490		13,490
Operating income								12,861
Interest expense - net						869		869
Income before income taxes								$	11,992

		December 29, 2018
(thousands)		Environmental Services		Oil Business		Corporate and Eliminations		Consolidated
Revenues
	Service revenues	$	237,806	$	12,456	$	—	$	250,262
	Product revenues	33,325		126,596		—		159,921
Total revenues		$	271,131	$	139,052	$	—	$	410,183
Operating expenses
	Operating costs	194,959		128,206		—		323,165
	Operating depreciation and amortization	6,766		6,141		—		12,907
Profit before corporate selling, general, and administrative expenses		$	69,406	$	4,705	$	—	$	74,111
Selling, general, and administrative expenses						47,714		47,714
Depreciation and amortization from SG&A						3,250		3,250
Total selling, general, and administrative expenses						$	50,964	$	50,964
Other expense - net						1,606		1,606
Operating income								21,541
Interest expense - net						1,052		1,052
Income before income taxes								$	20,489

		December 30, 2017
(thousands)		Environmental Services		Oil Business		Corporate and Eliminations		Consolidated
Revenues
	Service revenues	$	212,883	$	21,116	$	—	$	233,999
	Product revenues	25,172		106,786		—		131,958
Total revenues		$	238,055	$	127,902	$	—	$	365,957
Operating expenses
	Operating costs	163,633		112,469		—		276,102
	Operating depreciation and amortization	7,526		6,776		—		14,302
Profit before corporate selling, general, and administrative expenses		$	66,896	$	8,657	$	—	$	75,553
Selling, general, and administrative expenses						47,401		47,401
Depreciation and amortization from SG&A						3,665		3,665
Total selling, general, and administrative expenses						$	51,066	$	51,066
Other (income) - net						(10,940)		(10,940)
Operating income								35,427
Interest expense - net						1,094		1,094
Income before income taxes								$	34,333

Reconciliation of Assets from Segment to Consolidated

Total assets by segment as of December 28, 2019 and December 29, 2018 were as follows:

(thousands)	December 28, 2019		December 29, 2018
Total Assets:
Environmental Services	$	224,657	$	148,192
Oil Business	171,104		142,691
Unallocated Corporate Assets	75,553		56,939
Total	$	471,314	$	347,822

Capital Expenditures by Segment

Capital expenditures by segment for fiscal 2019, 2018, and 2017 were as follows:

	For the Fiscal Years Ended,
(thousands)	December 28, 2019		December 29, 2018		December 30, 2017
Total Capital Expenditures:
Environmental Services	$	18,499	$	12,756	$	6,843
Oil Business	12,670		9,858		6,998
Unallocated Corporate Assets	124		206		559
Total	$	31,293	$	22,820	$	14,400