- Changes in the Carrying Amount of Goodwill (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
Dec. 31, 2019	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Goodwill [Roll Forward]
Goodwill, beginning balance		$ 43,832	$ 43,620
Acquisition		9,258	562
Impairment	$ (11,400)	(11,422)	0	$ 0
Effects of foreign currency		664	(350)
Goodwill, ending balance	42,332	42,332	43,832	43,620
Fluids systems [Member]
Goodwill [Roll Forward]
Goodwill, beginning balance		1,641	1,782
Acquisition		9,258	0
Impairment		(11,422)
Effects of foreign currency		523	(141)
Goodwill, ending balance	0	0	1,641	1,782
Mats and integrated services [Member]
Goodwill [Roll Forward]
Goodwill, beginning balance		42,191	41,838
Acquisition		0	562
Impairment		0
Effects of foreign currency		141	(209)
Goodwill, ending balance	$ 42,332	$ 42,332	$ 42,191	$ 41,838

Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

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Amount of increase in asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized resulting from a business combination.

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Amount of foreign currency translation gain (loss) which increases (decreases) an asset representing future economic benefits from other assets acquired in a business combination that are not individually identified and separately recognized.

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Amount of loss from the write-down of an asset representing the future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

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