DEBT - Schedule of Long-Term Debt (Detail) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2014	Dec. 31, 2013
Debt Instrument [Line Items]
Total debt	$ 1,715,202	$ 1,431,043
Less: current portion of total debt	151,289	150,380
Long-term portion of total debt	1,563,913	1,280,663
Obligations under capital leases
Debt Instrument [Line Items]
Total debt	15,400	7,343
$1.2 billion senior credit facility weighted average rate 1.44%, due in 2019
Debt Instrument [Line Items]
Total debt	476,321	272,358
$100 million private placement notes 5.64%, due in 2015
Debt Instrument [Line Items]
Total debt	100,000	100,000
$175 million private placement notes 3.89%, due in 2017
Debt Instrument [Line Items]
Total debt	175,000	175,000
$125 million private placement notes 2.68%, due in 2019
Debt Instrument [Line Items]
Total debt	125,000	125,000
$225 million private placement notes 4.47%, due in 2020
Debt Instrument [Line Items]
Total debt	225,000	225,000
$125 million private placement notes 3.26%, due in 2022
Debt Instrument [Line Items]
Total debt	125,000	125,000
Promissory notes and deferred consideration weighted average rate of 2.01% and weighted average maturity of 3.3 years
Debt Instrument [Line Items]
Total debt	297,089	252,195
Foreign bank debt weighted average rate 7.76% and weighted average maturity of 1.9 years
Debt Instrument [Line Items]
Total debt	$ 176,392	$ 149,147