Goodwill and Other Intangible Assets (Tables)

12 Months Ended

Dec. 31, 2017

Goodwill and Intangible Assets Disclosure [Abstract]

Changes in the carrying amount of goodwill

Changes in the carrying amount of goodwill by reportable segment are as follows:

(In thousands)	Fluids Systems			Mats and Integrated Services			Total
Balance at December 31, 2015	$	—		$	19,009		$	19,009
Acquisition	1,720			—			1,720
Effects of foreign currency	(54		)	(680		)	(734		)
Balance at December 31, 2016	1,666			18,329			19,995
Acquisition	—			23,188			23,188
Effects of foreign currency	116			321			437
Balance at December 31, 2017	$	1,782		$	41,838		$	43,620

Other intangible assets

Other intangible assets consisted of the following:

	December 31, 2017							December 31, 2016
(In thousands)	Gross Carrying Amount		Accumulated Amortization			Other intangible assets, net		Gross Carrying Amount		Accumulated Amortization			Other intangible assets, net
Technology related	$	15,596	$	(4,427	)	$	11,169	$	5,766	$	(3,873	)	$	1,893
Customer related	42,903		(24,679		)	18,224		25,158		(21,962		)	3,196
Employment related	1,864		(1,794		)	70		1,848		(1,346		)	502
Total amortizing intangible assets	60,363		(30,900		)	29,463		32,772		(27,181		)	5,591
Permits and licenses	542		—			541		476		—			476
Total indefinite-lived intangible assets	542		—			541		476		—			476
Total intangible assets	$	60,905	$	(30,900	)	$	30,004	$	33,248	$	(27,181	)	$	6,067

Estimated future amortization expense

Estimated future amortization expense for the years ended December 31 is as follows:

(In thousands)	2018		2019		2020		2021		2022		Thereafter		Total
Technology related	$	1,013	$	1,019	$	991	$	940	$	878	$	6,328	$	11,169
Customer related	3,877		2,975		2,414		1,863		1,518		5,577		18,224
Employment related	70		—		—		—		—		—		70
Total future amortization expense	$	4,960	$	3,994	$	3,405	$	2,803	$	2,396	$	11,905	$	29,463