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Business Combinations (Details) - Well Service Group, Inc. and Utility Access Solutions, Inc. (WSG) - USD ($) $ in Thousands			6 Months Ended	8 Months Ended
	Jun. 30, 2018	Nov. 13, 2017	Jun. 30, 2018	Jun. 30, 2018
Business Acquisition [Line Items]
Business combination, consideration transferred	$ 77,437	$ 77,400
Cash conveyed		$ 44,750	$ 249	$ 45,000
Business acquisition, common shares issuance (in shares)		3,361,367
Equity issued at closing in 2017		$ 32,438
Intangible assets acquired		$ 27,000
Finite-lived intangible assets acquired, weighted-average amortization period		13 years
Minimum
Business Acquisition [Line Items]
Finite-lived intangible assets acquired, amortization period		10 years
Maximum
Business Acquisition [Line Items]
Finite-lived intangible assets acquired, amortization period		15 years