Goodwill and Other Intangible Assets (Details Textual) - USD ($) $ in Millions	1 Months Ended		12 Months Ended
	Nov. 30, 2017	Aug. 31, 2016	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Goodwill [Line Items]
Amortization of intangible assets			$ 3.3	$ 3.4	$ 4.6
Well Service Group, Inc. and Utility Access Solutions, Inc. (WSG) [Member]
Goodwill [Line Items]
Finite-lived intangible assets acquired	$ 27.1
Pragmatic Drilling Fluids Additives, Ltd [Member]
Goodwill [Line Items]
Finite-lived intangible assets acquired		$ 1.7
Technology-based intangible assets [Member]
Goodwill [Line Items]
Finite-lived intangible asset, useful life			15 years
Customer-related intangible assets [Member]
Goodwill [Line Items]
Finite-lived intangible asset, useful life			11 years
Employment related intangible assets [Member]
Goodwill [Line Items]
Finite-lived intangible asset, useful life			5 years