Acquisitions - Schedule of Amortized Intangible Assets And Liabilities (Details) - Layne and Liquiforce Acquisitions [Member] $ in Thousands	9 Months Ended
	Sep. 30, 2018 USD ($)
Finite Lived Intangible Assets And Liabilities [Line Items]
Gross Value, Assets	$ 66,924
Accumulated Amortization, Assets	(10,027)
Net Value, Assets	56,897
Gross Value, Liabilities	7,197
Accumulated Amortization, Liabilities	(3,297)
Net Value, Liabilities	$ 3,900
Customer Relationships [Member]
Finite Lived Intangible Assets And Liabilities [Line Items]
Weighted Average Useful Lives (Years), Assets	7 years
Gross Value, Assets	$ 33,391
Accumulated Amortization, Assets	(2,813)
Net Value, Assets	$ 30,578
Backlog [Member]
Finite Lived Intangible Assets And Liabilities [Line Items]
Weighted Average Useful Lives (Years), Assets	3 years
Gross Value, Assets	$ 9,488
Accumulated Amortization, Assets	(4,013)
Net Value, Assets	$ 5,475
Developed Technology [Member]
Finite Lived Intangible Assets And Liabilities [Line Items]
Weighted Average Useful Lives (Years), Assets	4 years
Gross Value, Assets	$ 9,276
Accumulated Amortization, Assets	(817)
Net Value, Assets	$ 8,459
Trademarks/Trade Names [Member]
Finite Lived Intangible Assets And Liabilities [Line Items]
Weighted Average Useful Lives (Years), Assets	4 years
Gross Value, Assets	$ 8,996
Accumulated Amortization, Assets	(770)
Net Value, Assets	$ 8,226
Favorable Contracts [Member]
Finite Lived Intangible Assets And Liabilities [Line Items]
Weighted Average Useful Lives (Years), Assets	3 years
Gross Value, Assets	$ 4,900
Accumulated Amortization, Assets	(1,511)
Net Value, Assets	$ 3,389
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	$ 873
Accumulated Amortization, Assets	(103)
Net Value, Assets	$ 770
Unfavorable Contracts [Member]
Finite Lived Intangible Assets And Liabilities [Line Items]
Weighted Average Useful Lives (Years),Laibilities	2 years
Gross Value, Liabilities	$ 6,897
Accumulated Amortization, Liabilities	(3,209)
Net Value, Liabilities	$ 3,688
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	(88)
Net Value, Liabilities	$ 212