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Borrowings - Components of Debt (Detail) - USD ($)
$ in Thousands
6 Months Ended
Jun. 30, 2016
Mar. 14, 2016
Dec. 31, 2015
Debt Instrument [Line Items]      
Total debt $ 1,491,157   $ 1,067,722
Less: Current portion of long-term debt (133,473)   (132,349)
Total long-term debt $ 1,357,684   935,373
Senior Notes 2006 [Member]      
Debt Instrument [Line Items]      
Rate 6.14%    
Maturities 2016    
Credit facilities $ 124,991   124,964
Senior Notes 2007 [Member]      
Debt Instrument [Line Items]      
Rate 6.40%    
Maturities 2017-27    
Credit facilities $ 499,618   499,618
Senior Notes 2007 [Member] | Minimum [Member]      
Debt Instrument [Line Items]      
Maturities 2017    
Senior Notes 2007 [Member] | Maximum [Member]      
Debt Instrument [Line Items]      
Maturities 2027    
Senior Notes 2013 [Member]      
Debt Instrument [Line Items]      
Rate 3.20%    
Maturities 2023    
Credit facilities $ 297,846   297,683
Senior Notes 2016 [Member]      
Debt Instrument [Line Items]      
Rate 1.75% 1.75%  
Maturities 2024    
Credit facilities $ 550,598   0
Revolver Borrowings [Member]      
Debt Instrument [Line Items]      
Rate 2.67%    
Maturities 2019    
Credit facilities $ 0   131,196
Bank overdrafts and other [Member]      
Debt Instrument [Line Items]      
Bank overdrafts and other 15,791   10,982
Deferred realized gains on interest rate swaps [Member]      
Debt Instrument [Line Items]      
Deferred realized gains on interest rate swaps $ 2,313   $ 3,279