Goodwill (Tables)

12 Months Ended

Dec. 31, 2014

Goodwill and Intangible Assets Disclosure [Abstract]

Schedule of changes in the carrying value of goodwill

Changes in the carrying value of goodwill for each reporting unit are as follows (in thousands):

	Energy Chemical Technologies		Consumer and Industrial Chemical Technologies			Downhole Tools			Teledrift®			Production Technologies			Total
Balance at December 31, 2012:
Goodwill	$	11,610	$	—		$	43,009		$	46,396		$	5,861		$	106,876
Accumulated impairment losses	—		—			(43,009		)	(31,063		)	(5,861		)	(79,933		)
Goodwill balance, net	11,610		—			—			15,333			—			26,943
Activity during the year 2013:
Goodwill impairment recognized	—		—			—			—			—			—
Acquisition goodwill recognized	18,686		20,642			—			—			—			39,328
Balance at December 31, 2013:
Goodwill	30,296		20,642			43,009			46,396			5,861			146,204
Accumulated impairment losses	—		—			(43,009		)	(31,063		)	(5,861		)	(79,933		)
Goodwill balance, net	30,296		20,642			—			15,333			—			66,271
Activity during the year 2014:
Goodwill impairment recognized	—		—			—			—			—			—
Acquisition goodwill recognized	6,022		(1,162		)	—			—			—			4,860
Balance at December 31, 2014:
Goodwill	36,318		19,480			43,009			46,396			5,861			151,064
Accumulated impairment losses	—		—			(43,009		)	(31,063		)	(5,861		)	(79,933		)
Goodwill balance, net	$	36,318	$	19,480		$	—		$	15,333		$	—		$	71,131