ACQUISITIONS, DIVESTITURES, AND ASSETS HELD FOR SALE - Aggregate Purchase Price Paid for Acquisitions and Other Adjustments to Consideration (Detail) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016
Business Acquisition [Line Items]
Cash	$ 23,812	$ 51,197
Promissory notes	16,795
Deferred consideration	1,001
Contingent consideration	(9,947)
Total purchase price	31,661
Current Period Acquisitions
Business Acquisition [Line Items]
Cash	24,336
Promissory notes	17,235
Deferred consideration	1,001
Contingent consideration	53
Total purchase price	42,625
Adjustments to Prior Year Acquisitions
Business Acquisition [Line Items]
Cash	(524)
Promissory notes	(440)
Contingent consideration	(10,000)
Total purchase price	$ (10,964)