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Borrowings - Components of Debt (Detail) - USD ($)
$ in Thousands
9 Months Ended
Sep. 30, 2015
Dec. 31, 2014
Debt Instrument [Line Items]    
Total debt $ 1,191,048 $ 942,322
Less: Current portion of long-term debt (133,056) (8,090)
Total long-term debt $ 1,057,992 934,232
Senior Notes 2007 [Member]    
Debt Instrument [Line Items]    
Rate 6.40%  
Credit facilities $ 500,000 500,000
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 2006 [Member]    
Debt Instrument [Line Items]    
Rate 6.14%  
Maturities 2016  
Credit facilities $ 125,000 125,000
Senior Notes 2013 [Member]    
Debt Instrument [Line Items]    
Rate 3.20%  
Maturities 2023  
Credit facilities $ 299,802 299,782
Revolver Borrowings [Member]    
Debt Instrument [Line Items]    
Rate 1.31%  
Maturities 2019  
Credit facilities $ 247,655 0
Bank overdrafts and other [Member]    
Debt Instrument [Line Items]    
Bank overdrafts and other 14,866 12,335
Deferred realized gains on interest rate swaps [Member]    
Debt Instrument [Line Items]    
Deferred realized gains on interest rate swaps $ 3,725 5,205
Reported Value Measurement [Member]    
Debt Instrument [Line Items]    
Credit facilities [1]   $ 299,782
[1] The fair value of our long-term debt was calculated using discounted cash flows applying current interest rates and current credit spreads based on our own credit risk.