ACQUISITIONS, DIVESTITURES, AND ASSETS HELD FOR SALE - Additional Information (Detail) $ in Thousands	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2017 USD ($)	Sep. 30, 2016 USD ($)	Sep. 30, 2017 USD ($) Entity	Sep. 30, 2016 USD ($)	Dec. 31, 2016 USD ($)
Business Acquisition [Line Items]
Number of acquisitions | Entity			24
Net increase (decrease) in goodwill			$ 23,747		$ 52,769
Effect of goodwill on income taxes	$ 21,800		21,800
Acquisition and integration related expenses	$ 16,435	$ 21,427	59,993	$ 68,870
Proceeds from sale of certain assets			1,170
Assets and Liabilities Held for Sale, Not Discontinued Operations | Selling, general and administrative expenses
Business Acquisition [Line Items]
Impairment charges			7,100
UK | Disposed of by Sale, Not Discontinued Operations
Business Acquisition [Line Items]
Proceeds from sale of certain assets			1,200
UK | Disposed of by Sale, Not Discontinued Operations | Selling, general and administrative expenses
Business Acquisition [Line Items]
Pretax loss from sale			5,600
Loss from sale, net of tax			4,500
Customer relationships
Business Acquisition [Line Items]
Acquired finite-lived intangible assets			$ 15,500
Customer relationships | Minimum
Business Acquisition [Line Items]
Acquired finite-lived intangible assets, useful life			10 years
Customer relationships | Maximum
Business Acquisition [Line Items]
Acquired finite-lived intangible assets, useful life			40 years