Goodwill and Intangible Assets (Tables)

12 Months Ended

Dec. 31, 2015

Goodwill And Intangible Assets Disclosure [Abstract]

Goodwill / Tradename

(Table only in thousands)	Environmental Segment		Energy Segment			FluidHandling andFiltration Segment		Totals
Balance of goodwill at December 31, 2013	$	22,657	$	14,174		$	93,057	$	129,888
2014 acquisitions		32,374		4,752			—		37,126
Foreign currency translation		—		(1,153	)		—		(1,153	)
Balance of goodwill at December 31, 2014		55,031		17,773			93,057		165,861
2015 acquisition		—		55,655			—		55,655
Foreign currency translation		—		(1,353	)		—		(1,353	)
Balance of goodwill at December 31, 2015	$	55,031	$	72,075		$	93,057	$	220,163

	Tradenames
(Table only in thousands)	2015			2014
Beginning balance	$	19,766		$	18,419
Acquisitions and related adjustments		10,280			1,730
Impairment		(3,340	)		—
Foreign currency adjustments		(369	)		(383	)
	$	26,337		$	19,766

Intangible Assets - Finite Life

	2015						2014
(Table only in thousands) Intangible assets – finite life	Cost			Accum. Amort.			Cost			Accum. Amort
Patents	$	1,456		$	1,456		$	1,429		$	1,427
Employment agreements		733			677			733			461
Technology		15,867			4,027			8,677			2,412
Customer lists		77,497			17,756			59,017			9,094
Noncompetition agreements		1,118			257			1,118			34
Tradename		1,390			162			1,390			23
Backlog		4,270			1,423			—			—
Foreign currency adjustments		(2,309	)		(693	)		(800	)		(285	)
	$	100,022		$	25,065		$	71,564		$	13,166