ACQUISITIONS AND DIVESTITURES - Aggregate Purchase Price Paid for Acquisitions and Other Adjustments to Consideration (Detail) (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013
Business Combinations [Abstract]
Cash	$ 304,832	$ 63,401
Promissory notes	63,022	13,725
Deferred consideration	5,032	5,803
Contingent consideration	15,810	3,378
Total purchase price	$ 388,696	$ 86,307