v3.3.1.900
Summary of Significant Accounting Policies Accounting Policies (Details Textual)
$ in Thousands, € in Millions
 12 Months Ended
Dec. 31, 2015
USD ($)
Dec. 31, 2014
USD ($)
Dec. 31, 2013
USD ($)
Dec. 31, 2015
EUR (€)
Dec. 31, 2015
USD ($)
Revenues in excess of billings on long-term contracts   $ 190,700     $ 149,500
Billings in excess of revenues on long-term contracts   175,300     146,300
Increase in Allowance for Doubtful Accounts related to specific South American customers         9,400
Finite-lived intangible assets, estimated useful lives, accelerated basis seven to 30 years        
Finite-Lived Intangible Assets, Estimated Useful Lives two to 20 years        
Non-cash impairment provisions $ 11,391 $ 4,643      
Devaluation Percentage Of Bolivar Fuerte   87.00% 32.00%    
Loss Recognized in Income Due to Inflationary Accounting   $ (6,300) $ (2,900)    
Percentage of Assets of Venezuelan Subsidiary less than 1% less than 1%      
Percentage of Sales of Venezuelan Subsidiary less than 1% less than 1%      
Net Monetary Assets of Venezuelan Subsidiary   $ 700     100
Deferred Finance Costs, Net   9,900     8,100
Deferred issuance costs, accumulated amortization   8,600     13,400
Payments of debt issuance costs $ 3,400 300 7,100    
Asset Impairments Related to Facility Closures [Member]          
Fair Value of Long-Lived Assets Impaired During the Year   15,100 4,900   21,100
Non-cash impairment provisions 9,300 4,600 1,900    
Db term debt [Domain]          
Notional Amount of Nonderivative Instruments Designated as Net Investment Hedges | €       € 263.5  
Interest expense [Member]          
Foreign currency transaction (loss) gain (3,900) (5,100) (4,100)    
Selling, general and administrative expense [Member]          
Research and development costs 41,500 43,000 27,400    
Advertising costs 14,500 18,200 17,000    
Foreign currency transaction (loss) gain 2,100 (5,500) (5,200)    
Fabrication Technology [Member]          
Impairment of Intangible Assets, Indefinite-lived (Excluding Goodwill) 1,500        
Fair Value of Indefinite-Lived Trade Names Impaired During the Year         2,800
Non-cash impairment provisions 8,822 1,780      
Gas and Fluid Handling [Member]          
Impairment of Intangible Assets, Indefinite-lived (Excluding Goodwill)   2,900 $ 200    
Impairment of Intangible Assets, Finite-lived 1,700 10,500      
Fair Value of Finite-Lived Intangible Assets Impaired During the Year   3,300     800
Non-cash impairment provisions $ 2,569 2,863      
Assets Held under Capital Leases [Member]          
Property, Plant and Equipment, Estimated Useful Lives three to 15 years        
Other Assets [Member]          
Deferred Finance Costs, Net   7,500     6,900
Long-term Debt, Type [Domain]          
Deferred Finance Costs, Net   $ 2,400     $ 1,200