Note 17 - Business Segment Information (Tables)

9 Months Ended

Sep. 30, 2021

Notes Tables

Schedule of Segment Reporting Information, by Segment [Table Text Block]

	Transportation		Water		Specialty		Materials			Total
2021
Total revenue from reportable segments	$	568,186	$	121,968	$	234,300	$	201,419		$	1,125,873
Elimination of intersegment revenue		—		—		—		(63,744	)		(63,744	)
Revenue from external customers		568,186		121,968		234,300		137,675			1,062,129
Gross profit		58,503		9,876		30,858		20,698			119,935
Depreciation, depletion and amortization		5,513		7,074		5,643		7,014			25,244

2020
Total revenue from reportable segments	$	623,999	$	106,599	$	205,134	$	194,298		$	1,130,030
Elimination of intersegment revenue		—		—		—		(64,841	)		(64,841	)
Revenue from external customers		623,999		106,599		205,134		129,457			1,065,189
Gross profit		54,322		12,557		33,292		25,826			125,997
Depreciation, depletion and amortization		5,268		8,258		5,046		6,120			24,692

	Transportation		Water		Specialty		Materials			Total
2021
Total revenue from reportable segments	$	1,444,450	$	335,153	$	590,245	$	457,409		$	2,827,257
Elimination of intersegment revenue		—		—		—		(131,043	)		(131,043	)
Revenue from external customers		1,444,450		335,153		590,245		326,366			2,696,214
Gross profit		153,886		29,005		72,552		44,756			300,199
Depreciation, depletion and amortization		15,595		21,677		15,894		19,329			72,495
Segment assets		305,800		107,327		100,279		355,936			869,342

2020
Total revenue from reportable segments	$	1,510,001	$	317,980	$	513,087	$	400,808		$	2,741,876
Elimination of intersegment revenue		—		—		—		(124,989	)		(124,989	)
Revenue from external customers		1,510,001		317,980		513,087		275,819			2,616,887
Gross profit		110,888		34,483		47,853		44,915			238,139
Depreciation, depletion and amortization		14,685		27,399		18,166		16,563			76,813
Segment assets		305,962		142,604		118,797		361,862			929,225

Reconciliation of Operating Profit (Loss) from Segments to Consolidated [Table Text Block]

	Three Months Ended September 30,						Nine Months Ended September 30,
(in thousands)	2021			2020			2021			2020
Total gross profit from reportable segments	$	119,935		$	125,997		$	300,199		$	238,139
Selling, general and administrative expenses		77,603			72,889			227,400			224,128
Non-cash impairment charges (see Note 3)		—			132,277			—			156,690
Other costs (see Note 3)		3,759			9,689			85,547			28,513
Gain on sales of property and equipment (see Note 12)		(5,159	)		(3,057	)		(39,349	)		(4,870	)
Total other expense, net		2,405			1,284			1,686			10,766
Income (loss) before provision for (benefit from) income taxes	$	41,327		$	(87,085	)	$	24,915		$	(177,088	)