Goodwill and Intangible Assets (Tables)

6 Months Ended

Jun. 30, 2013

Goodwill and Intangible Assets Disclosure [Abstract]

Schedule of Goodwill [Table Text Block]

The following table represents the changes in goodwill by segment:

	Energy and Chemicals		Distribution & Storage			BioMedical		Total
Balance at December 31, 2012	$	83,215	$	158,789		$	156,937	$	398,941
Foreign currency translation adjustments and other	—		(320		)	—		(320		)
Goodwill acquired during the year	—		1,159			—		1,159
Balance at June 30, 2013	$	83,215	$	159,628		$	156,937	$	399,780

Schedule Of Finite Lived And Indefinite Lived Intangible Assets [Table Text Block]

The following table displays the gross carrying amount and accumulated amortization for finite-lived intangible assets and indefinite-lived intangible assets (exclusive of goodwill):

	June 30, 2013					December 31, 2012
	Gross Carrying Amount		Accumulated Amortization			Gross Carrying Amount		Accumulated Amortization
Finite-lived intangible assets:
Unpatented technology	$	42,944	$	(10,406	)	$	45,078	$	(11,286	)
Patents	7,908		(5,067		)	9,880		(6,664		)
Product names	9,053		(3,632		)	9,068		(2,712		)
Customer relations	158,933		(66,662		)	158,005		(59,668		)
Total finite-lived intangible assets	$	218,838	$	(85,767	)	$	222,031	$	(80,330	)
Indefinite-lived intangible assets:
Trademarks and trade names	$	48,093				$	47,762
Total indefinite-lived intangible assets	$	48,093				$	47,762

Schedule of Finite-Lived Intangible Assets, Future Amortization Expense [Table Text Block]

The Company estimates amortization expense to be recognized during the next five years as follows:

For the Year Ending December 31,
2013	$	19,200
2014	17,800
2015	16,200
2016	14,300
2017	13,300