ACQUISITIONS, DIVESTITURES, AND ASSETS HELD FOR SALE - Aggregate Purchase Price Paid for Acquisitions and Other Adjustments to Consideration (Detail) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016
Business Acquisition [Line Items]
Cash	$ 21,159	$ 42,097
Promissory notes	14,110
Deferred consideration	1,001
Contingent consideration	53
Total purchase price	36,323
Current Period Acquisitions
Business Acquisition [Line Items]
Cash	21,140
Promissory notes	14,550
Deferred consideration	1,001
Contingent consideration	53
Total purchase price	36,744
Adjustments to Prior Year Acquisitions
Business Acquisition [Line Items]
Cash	19
Promissory notes	(440)
Total purchase price	$ (421)