Note 17 - Business Segment Information (Tables)

3 Months Ended

Mar. 31, 2021

Notes Tables

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

	Transportation		Water		Specialty		Materials			Total
2021
Total revenue from reportable segments	$	351,029	$	99,753	$	155,674	$	79,149		$	685,605
Elimination of intersegment revenue		—		—		—		(15,692	)		(15,692	)
Revenue from external customers		351,029		99,753		155,674		63,457			669,913
Gross profit		35,866		8,566		17,325		1,561			63,318
Depreciation, depletion and amortization		4,512		7,280		4,577		5,634			22,003
Segment assets		297,663		130,185		106,534		362,354			896,736

2020
Total revenue from reportable segments	$	350,901	$	101,657	$	133,039		$	64,652		$	650,249
Elimination of intersegment revenue		—		—		—			(14,322	)		(14,322	)
Revenue from external customers		350,901		101,657		133,039			50,330			635,927
Gross profit (loss)		25,369		9,347		(10,719	)		(198	)		23,799
Depreciation, depletion and amortization		5,026		9,564		6,383			4,973			25,946
Segment assets		304,376		275,447		128,471			366,559			1,074,853

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

	Three Months Ended March 31,
(in thousands)	2021			2020
Total gross profit from reportable segments	$	63,318		$	23,799
Selling, general and administrative expenses		75,728			73,216
Non-cash impairment charges (see Note 3)		—			24,413
Gain on sales of property and equipment		(2,554	)		(623	)
Other costs (see Note 3)		75,835			5,165
Total other expense		2,087			8,876
Loss before benefit from income taxes	$	(87,778	)	$	(87,248	)