DEBT - Schedule of Long-Term Debt (Detail) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Debt Instrument [Line Items]
Total debt	$ 2,765,497	$ 2,959,316
Less: current portion of total debt	122,189	72,822
Less: unamortized debt issuance costs	9,576	9,179
Long-term portion of total debt	2,633,732	2,877,315
Obligations under capital leases
Debt Instrument [Line Items]
Total debt	9,855	11,121
$1.2 billion senior credit facility weighted average rate 2.40%, due in 2019
Debt Instrument [Line Items]
Total debt	353,601	407,119
$1.0 billion term loan weighted average rate 2.65%, due in 2020
Debt Instrument [Line Items]
Total debt	900,000	1,000,000
$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
$150 million private placement notes 2.89%, due in 2021
Debt Instrument [Line Items]
Total debt	150,000	150,000
$125 million private placement notes 3.26%, due in 2022
Debt Instrument [Line Items]
Total debt	125,000	125,000
$200 million private placement notes 2.72%, due in 2022
Debt Instrument [Line Items]
Total debt	200,000	200,000
$100 million private placement notes 2.79%, due in 2023
Debt Instrument [Line Items]
Total debt	100,000	100,000
$150 million private placement notes 3.18%, due in 2023
Debt Instrument [Line Items]
Total debt	150,000	150,000
Promissory notes and deferred consideration weighted average rate of 2.04% and weighted average maturity of 2.9 years
Debt Instrument [Line Items]
Total debt	163,685	191,648
Foreign bank debt weighted average rate 6.40% and weighted average maturity of 1.7 years
Debt Instrument [Line Items]
Total debt	$ 88,356	$ 99,428