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Long-Term Debt - Additional Information (Details) - USD ($)
3 Months Ended 6 Months Ended
Oct. 15, 2015
Jun. 30, 2016
Jun. 30, 2015
Jun. 30, 2016
Jun. 30, 2015
Dec. 31, 2015
Debt Instrument [Line Items]            
Long-term debt   $ 16,800,000   $ 16,800,000   $ 20,300,000
Repayments of long-term debt       382,162,000 $ 1,331,648,000  
Net investment hedge, gain (loss)   6,607,000 $ (10,930,000) (2,917,000) $ 43,116,000  
September 2015 Term Loan Agreement            
Debt Instrument [Line Items]            
Unamortized debt issuance costs   $ 2,212,000   2,212,000   $ 2,833,000
364 Day Facility            
Debt Instrument [Line Items]            
Debt instrument term 364 days          
Principal amount of debt $ 300,000,000          
Repayments of long-term debt       300,000,000.0    
Five Year Facility            
Debt Instrument [Line Items]            
Debt instrument term 5 years          
Principal amount of debt $ 950,000,000          
Repayments of long-term debt       $ 81,000,000    
Commercial Paper            
Debt Instrument [Line Items]            
Weighted average interest rate   1.34%   1.34%    
Debt instrument maturity period       21 days    
1.875% Senior Notes            
Debt Instrument [Line Items]            
Debt instrument, interest rate   1.875%   1.875%   1.875%
Long-Term Debt Excluding Revolving Credit Facility            
Debt Instrument [Line Items]            
Unamortized debt issuance costs           $ 17,100,000