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BUSINESS COMBINATIONS - Summary of Purchase Price Paid for Acquisitions (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019	Dec. 31, 2019
Purchase Price:
Cash used in acquisitions, net of cash acquired	$ 5,144	$ 1,222
Allocated as follows:
Excess purchase price allocated to goodwill	186,626		$ 185,819
Waste Collection Acquisitions
Purchase Price:
Cash used in acquisitions, net of cash acquired	4,771	0
Holdbacks	580	0
Total	5,351	0
Allocated as follows:
Land	325	0
Buildings	678	0
Equipment	2,396	0
Intangible assets	1,225	0
Other liabilities, net	(80)	0
Fair value of assets acquired and liabilities assumed	4,544	0
Excess purchase price allocated to goodwill	$ 807	$ 0

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