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Goodwill and Intangible Assets (Tables)
 9 Months Ended
Sep. 30, 2015
Goodwill and Intangible Assets Disclosure [Abstract]  
Schedule of Goodwill [Table Text Block]
The following table represents the changes in goodwill by segment:
 
Energy &
Chemicals
 
Distribution & Storage
 
BioMedical
 
Total
Balance at December 31, 2014
$
92,638

 
$
157,248

 
$
155,636

 
$
405,522

Foreign currency translation adjustments and other
(359
)
 
(1,643
)
 
—

 
(2,002
)
Goodwill acquired during the year
—

 
10,601

 
—

 
10,601

Balance at September 30, 2015
$
92,279

 
$
166,206

 
$
155,636

 
$
414,121
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)(1)(2):
 
September 30, 2015
 
December 31, 2014
 
Gross
Carrying
Amount
 
Accumulated
Amortization
 
Gross
Carrying
Amount
 
Accumulated
Amortization
Finite-lived intangible assets:
 
 
 
 
 
 
 
Unpatented technology
$
35,510

 
$
(6,672
)
 
$
35,933

 
$
(6,979
)
Patents
7,780

 
(6,716
)
 
7,809

 
(6,213
)
Trademarks and trade names
10,058

 
(6,784
)
 
8,981

 
(6,206
)
Non-compete agreements
405

 
(344
)
 
421

 
(88
)
Customer relationships
161,863

 
(94,652
)
 
154,945

 
(84,776
)
     Land use rights
13,752

 
(509
)
 
2,588

 
(411
)
Total finite-lived intangible assets
$
229,368

 
$
(115,677
)
 
$
210,677

 
$
(104,673
)
Indefinite-lived intangible assets:
 
 
 
 
 
 
 
Trademarks and trade names
$
47,537

 
 
 
$
47,662

 
 
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,
 
2015
$
17,300

2016
15,500

2017
14,300

2018
13,500

2019
13,400