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Goodwill and Other Intangibles (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Goodwill [Line Items]      
Goodwill $ 356,864 $ 354,838  
Goodwill acquired during the period 7,000    
Goodwill foreign currency translation adjustments (5,000)    
Finite-Lived Intangible Assets [Line Items]      
Finite-lived intangible assets, accumulated amortization $ 359,706 $ 339,186  
Finite-lived intangible assets, average useful life in years 8 years 8 years  
Indefinite-Lived Intangible Assets [Line Items]      
Indefinite-lived intangible assets $ 14,364 $ 14,095  
Intangible Assets [Line Items]      
Intangible assets, gross 577,728 569,008  
Intangible assets, gross foreign currency translation adjustments (41,000)    
Intangible assets, accumulated amortization foreign currency translation adjustments (24,000)    
Amortization expense 45,000 48,000 $ 42,000
FiniteLivedIntangibleAssetsFutureAmortizationExpenseAbstract      
Future amortization expense, year 1 45,000    
Future amortization expense, year 2 45,000    
Future amortization expense, year 3 45,000    
Future amortization expense, year 4 45,000    
Future amortization expense, year 5 45,000    
Capitalized software [Member]      
Finite-Lived Intangible Assets [Line Items]      
Finite-lived intangible assets, gross 335,949 334,280  
Finite-lived intangible assets, accumulated amortization $ 204,267 $ 196,477  
Finite-lived intangible assets, average useful life in years 7 years 7 years  
Purchased intangibles [Member]      
Finite-Lived Intangible Assets [Line Items]      
Finite-lived intangible assets, gross $ 163,500 $ 163,855  
Finite-lived intangible assets, accumulated amortization $ 119,505 $ 112,279  
Finite-lived intangible assets, average useful life in years 11 years 11 years  
Licenses [Member]      
Finite-Lived Intangible Assets [Line Items]      
Finite-lived intangible assets, gross $ 5,396 $ 5,371  
Finite-lived intangible assets, accumulated amortization $ 4,046 $ 3,634  
Finite-lived intangible assets, average useful life in years 6 years 6 years  
Patents and other intangibles [Member]      
Finite-Lived Intangible Assets [Line Items]      
Finite-lived intangible assets, gross $ 58,519 $ 51,407  
Finite-lived intangible assets, accumulated amortization $ 31,888 $ 26,796  
Finite-lived intangible assets, average useful life in years 8 years 8 years  
Acquisitions in 2015 [Member]      
Goodwill [Line Items]      
Goodwill $ 7,498    
Intangible Assets [Line Items]      
Intangible assets acquired $ 5,920