Acquisitions - Schedule of Amortized Intangible Assets And Liabilities (Details) - Layne and Liquiforce Acquisitions [Member] $ in Thousands	6 Months Ended
	Jun. 30, 2018 USD ($)
Finite Lived Intangible Assets And Liabilities [Line Items]
Gross Value, Assets	$ 71,981
Accumulated Amortization, Assets	(3,665)
Net Value, Assets	68,316
Gross Value, Liabilities	7,192
Accumulated Amortization, Liabilities	(965)
Net Value, Liabilities	$ 6,227
Customer Relationships [Member]
Finite Lived Intangible Assets And Liabilities [Line Items]
Weighted Average Useful Lives (Years), Assets	7 years
Gross Value, Assets	$ 34,674
Accumulated Amortization, Assets	(728)
Net Value, Assets	$ 33,946
Backlog [Member]
Finite Lived Intangible Assets And Liabilities [Line Items]
Weighted Average Useful Lives (Years), Assets	3 years
Gross Value, Assets	$ 11,163
Accumulated Amortization, Assets	(1,890)
Net Value, Assets	$ 9,273
Developed Technology [Member]
Finite Lived Intangible Assets And Liabilities [Line Items]
Weighted Average Useful Lives (Years), Assets	4 years
Gross Value, Assets	$ 9,228
Accumulated Amortization, Assets	(234)
Net Value, Assets	$ 8,994
Trademarks/Trade Names [Member]
Finite Lived Intangible Assets And Liabilities [Line Items]
Weighted Average Useful Lives (Years), Assets	4 years
Gross Value, Assets	$ 8,989
Accumulated Amortization, Assets	(163)
Net Value, Assets	$ 8,826
Favorable Contracts [Member]
Finite Lived Intangible Assets And Liabilities [Line Items]
Weighted Average Useful Lives (Years), Assets	3 years
Gross Value, Assets	$ 4,800
Accumulated Amortization, Assets	(596)
Net Value, Assets	$ 4,204
Right of Ways [Member]
Finite Lived Intangible Assets And Liabilities [Line Items]
Weighted Average Useful Lives (Years), Assets	12 years
Gross Value, Assets	$ 2,268
Accumulated Amortization, Assets	(12)
Net Value, Assets	$ 2,256
Covenants not to compete and other [Member]
Finite Lived Intangible Assets And Liabilities [Line Items]
Weighted Average Useful Lives (Years), Assets	5 years
Gross Value, Assets	$ 859
Accumulated Amortization, Assets	(42)
Net Value, Assets	$ 817
Unfavorable Contracts [Member]
Finite Lived Intangible Assets And Liabilities [Line Items]
Weighted Average Useful Lives (Years),Laibilities	2 years
Gross Value, Liabilities	$ 6,892
Accumulated Amortization, Liabilities	(952)
Net Value, Liabilities	$ 5,940
Unfavorable Leases [Member]
Finite Lived Intangible Assets And Liabilities [Line Items]
Weighted Average Useful Lives (Years),Laibilities	1 year
Gross Value, Liabilities	$ 300
Accumulated Amortization, Liabilities	(13)
Net Value, Liabilities	$ 287