Goodwill and Other Intangible Assets (Tables)

12 Months Ended

Dec. 31, 2018

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, 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
Acquisition	—			562			562
Effects of foreign currency	(141		)	(209		)	(350		)
Balance at December 31, 2018	$	1,641		$	42,191		$	43,832

Other intangible assets

Other intangible assets consisted of the following:

	December 31, 2018							December 31, 2017
(In thousands)	Gross Carrying Amount		Accumulated Amortization			Other Intangible Assets, Net		Gross Carrying Amount		Accumulated Amortization			Other Intangible Assets, Net
Technology related	$	17,380	$	(5,509	)	$	11,871	$	15,596	$	(4,427	)	$	11,169
Customer related	40,662		(27,891		)	12,771		42,903		(24,679		)	18,224
Employment related	1,845		(1,845		)	—		1,864		(1,794		)	70
Total amortizing intangible assets	59,887		(35,245		)	24,642		60,363		(30,900		)	29,463
Permits and licenses	518		—			518		541		—			541
Total indefinite-lived intangible assets	518		—			518		541		—			541
Total intangible assets	$	60,405	$	(35,245	)	$	25,160	$	60,904	$	(30,900	)	$	30,004

Estimated future amortization expense

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

(In thousands)	2019		2020		2021		2022		2023		Thereafter		Total
Technology related	$	1,140	$	1,112	$	1,061	$	1,002	$	836	$	6,720	$	11,871
Customer related	2,656		2,150		1,652		1,348		1,198		3,767		12,771
Total future amortization expense	$	3,796	$	3,262	$	2,713	$	2,350	$	2,034	$	10,487	$	24,642