Borrowings - Components of Debt (Detail) (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Jun. 30, 2014	Dec. 31, 2013
Debt Instrument [Line Items]
Total debt	$ 935,673	$ 932,814
Less: Current portion of long-term debt	(3,052)	(149)
Total long-term debt	932,621	932,665
Senior Notes In Two Thousand Seven [Member]
Debt Instrument [Line Items]
Rate	6.40%
Credit facilities	500,000	500,000
Senior Notes In Two Thousand Seven [Member] | Minimum [Member]
Debt Instrument [Line Items]
Maturities	2017
Senior Notes In Two Thousand Seven [Member] | Maximum [Member]
Debt Instrument [Line Items]
Maturities	2027
Senior Notes In Two Thousand Six [Member]
Debt Instrument [Line Items]
Rate	6.14%
Maturities	2016
Credit facilities	125,000	125,000
Senior Notes In Two Thousand Thirteen [Member]
Debt Instrument [Line Items]
Rate	3.20%
Maturities	2023
Credit facilities	299,767
Bank overdrafts and other [Member]
Debt Instrument [Line Items]
Bank overdrafts and other	4,747	984
Deferred realized gains on interest rate swaps [Member]
Debt Instrument [Line Items]
Deferred realized gains on interest rate swaps	$ 6,159	$ 7,094