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Goodwill and Intangible Assets Goodwill (Details) - USD ($)
$ in Thousands
3 Months Ended 12 Months Ended
Mar. 31, 2016
Dec. 31, 2015
Goodwill [Line Items]    
Goodwill, Impairment Loss   $ (195,846)
Goodwill [Roll Forward]    
Beginning Balance, Goodwill $ 218,390  
Goodwill, Translation and Purchase Accounting Adjustments 868  
Ending Balance, Goodwill 219,258 218,390
Goodwill, Impaired, Accumulated Impairment Loss 195,846  
Energy & Chemicals [Member]    
Goodwill [Roll Forward]    
Beginning Balance, Goodwill 27,873  
Goodwill, Translation and Purchase Accounting Adjustments 0  
Ending Balance, Goodwill 27,873 27,873
Goodwill, Impaired, Accumulated Impairment Loss 64,603  
Distribution & Storage [Member]    
Goodwill [Roll Forward]    
Beginning Balance, Goodwill 165,940  
Goodwill, Translation and Purchase Accounting Adjustments 868  
Ending Balance, Goodwill 166,808 165,940
Goodwill, Impaired, Accumulated Impairment Loss 0  
BioMedical [Member]    
Goodwill [Roll Forward]    
Beginning Balance, Goodwill 24,577  
Goodwill, Translation and Purchase Accounting Adjustments 0  
Ending Balance, Goodwill 24,577 $ 24,577
Goodwill, Impaired, Accumulated Impairment Loss $ 131,243