Debt (Schedule of Debt) (Details) (USD $)
In Thousands, unless otherwise specified
Mar. 31, 2015
Dec. 31, 2014
Debt Instrument [Line Items]    
Capital lease obligations and other borrowings $ 29,300 $ 27,731
Debt and capital lease obligations 1,679,521 1,154,922
Less amounts due within one year 58,739 53,131
Total debt due after one year 1,620,782 1,101,791
2022 EUR Senior Notes    
Debt Instrument [Line Items]    
Long-term Debt 532,957 0
Stated interest rate (as a percent) 1.25% 0.00%
2023 Senior Notes    
Debt Instrument [Line Items]    
Long-term Debt 298,761 298,731
Stated interest rate (as a percent) 4.00% 4.00%
2022 Senior notes    
Debt Instrument [Line Items]    
Long-term Debt 498,503 498,460
Stated interest rate (as a percent) 3.50% 3.50%
Term Loan Facility    
Debt Instrument [Line Items]    
Term Loan Facility $ 320,000 $ 330,000
Effective interest rate (as a percent) 1.52% 1.51%