Goodwill and Intangible Assets (Tables)

12 Months Ended

Dec. 31, 2016

Goodwill And Intangible Assets Disclosure [Abstract]

Goodwill / Tradename

(Table only in thousands)	Energy Segment			Environmental Segment			FluidHandling andFiltration Segment			Totals
Balance of goodwill at December 31, 2014	$	17,773		$	55,031		$	93,057		$	165,861
2015 acquisition		55,655			—			—			55,655
Foreign currency translation		(1,353	)		—			—			(1,353	)
Balance of goodwill at December 31, 2015		72,075			55,031			93,057			220,163
2016 acquisition related adjustments		4,205			—			—			4,205
Impairment charge		—			(6,828	)		(46,934	)		(53,762	)
Foreign currency translation		(453	)		—			—			(453	)
Balance of goodwill at December 31, 2016	$	75,827		$	48,203		$	46,123		$	170,153

	Tradenames
(Table only in thousands)	2016			2015
Beginning balance	$	26,337		$	19,766
Acquisitions and related adjustments		—			10,280
Impairment charge		(4,161	)		(3,340	)
Foreign currency adjustments		(134	)		(369	)
	$	22,042		$	26,337

Intangible Assets - Finite Life

	2016						2015
(Table only in thousands) Intangible assets – finite life	Cost			Accum. Amort.			Cost			Accum. Amort.
Patents	$	1,439		$	1,439		$	1,456		$	1,456
Employment agreements		733			733			733			677
Technology		15,867			6,360			15,867			4,027
Customer lists		77,497			26,041			77,497			17,756
Noncompetition agreements		1,118			478			1,118			257
Tradename		1,390			301			1,390			162
Backlog		4,270			4,270			4,270			1,423
Foreign currency adjustments		(2,964	)		(1,000	)		(2,309	)		(693	)
	$	99,350		$	38,622		$	100,022		$	25,065