Business Segment Information - Schedule of Segment Reporting Information (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017	Dec. 31, 2017
Segment Reporting Information [Line Items]
Total revenue	$ 1,055,591	$ 957,126	$ 2,426,089	$ 2,188,439
Gross profit	144,491	114,530	281,143	214,226
Segment assets	2,643,848	1,947,288	2,643,848	1,947,288	$ 1,871,978
Operating Segments [Member]
Segment Reporting Information [Line Items]
Total revenue	1,120,561	1,039,256	2,542,436	2,328,734
Gross profit	144,491	114,530	281,143	214,226
Depreciation, depletion and amortization	32,848	14,820	70,883	40,837
Segment assets	1,229,398	755,345	1,229,398	755,345
Intersegment Eliminations [Member]
Segment Reporting Information [Line Items]
Total revenue	(64,970)	(82,130)	(116,347)	(140,295)
Transportation [Member]
Segment Reporting Information [Line Items]
Total revenue	610,847	624,727	1,472,703	1,423,396
Transportation [Member] | Operating Segments [Member]
Segment Reporting Information [Line Items]
Total revenue	610,847	624,727	1,472,703	1,423,396
Gross profit	70,976	65,540	138,401	119,907
Depreciation, depletion and amortization	7,592	5,820	17,920	16,047
Segment assets	394,981	372,028	394,981	372,028
Transportation [Member] | Intersegment Eliminations [Member]
Segment Reporting Information [Line Items]
Total revenue	0	0	0	0
Water [Member]
Segment Reporting Information [Line Items]
Total revenue	124,292	36,378	215,951	100,944
Water [Member] | Operating Segments [Member]
Segment Reporting Information [Line Items]
Total revenue	124,292	36,378	215,951	100,944
Gross profit	24,103	1,805	41,117	9,772
Depreciation, depletion and amortization	11,191	550	16,075	1,716
Segment assets	308,964	8,130	308,964	8,130
Water [Member] | Intersegment Eliminations [Member]
Segment Reporting Information [Line Items]
Total revenue	0	0	0	0
Specialty [Member]
Segment Reporting Information [Line Items]
Total revenue	190,836	197,886	461,149	452,265
Specialty [Member] | Operating Segments [Member]
Segment Reporting Information [Line Items]
Total revenue	190,836	197,886	461,149	452,265
Gross profit	28,099	27,797	65,311	56,736
Depreciation, depletion and amortization	7,569	2,626	18,908	6,635
Segment assets	150,437	87,366	150,437	87,366
Specialty [Member] | Intersegment Eliminations [Member]
Segment Reporting Information [Line Items]
Total revenue	0	0	0	0
Materials [Member]
Segment Reporting Information [Line Items]
Total revenue	129,616	98,135	276,286	211,834
Materials [Member] | Operating Segments [Member]
Segment Reporting Information [Line Items]
Total revenue	194,586	180,265	392,633	352,129
Gross profit	21,313	19,388	36,314	27,811
Depreciation, depletion and amortization	6,496	5,824	17,980	16,439
Segment assets	375,016	287,821	375,016	287,821
Materials [Member] | Intersegment Eliminations [Member]
Segment Reporting Information [Line Items]
Total revenue	$ (64,970)	$ (82,130)	$ (116,347)	$ (140,295)