GOODWILL AND INTANGIBLE ASSETS (Tables)

3 Months Ended

Mar. 31, 2017

Goodwill and Intangible Assets Disclosure [Abstract]

Schedule of Activity and Balances Related to Goodwill by Operating Segment

A summary of the activity and balances related to goodwill by operating segment follows:

	December 31, 2016		Acquisitions		March 31, 2017
Eastern region	$	17,429	$	—	$	17,429
Western region	88,426		37		88,463
Recycling	12,315		—		12,315
Other	1,729		—		1,729
Total	$	119,899	$	37	$	119,936

Summary of Intangible Assets by Intangible Asset Type

A summary of intangible assets by intangible asset type follows:

	Covenants Not-to-Compete			Client Lists			Total
Balance, March 31, 2017
Intangible assets	$	17,624		$	16,304		$	33,928
Less accumulated amortization	(16,517		)	(9,939		)	(26,456		)
	$	1,107		$	6,365		$	7,472

	Covenants Not-to-Compete			Client Lists			Total
Balance, December 31, 2016
Intangible assets	$	17,594		$	16,071		$	33,665
Less accumulated amortization	(16,402		)	(9,567		)	(25,969		)
	$	1,192		$	6,504		$	7,696

Summary of Intangible Amortization Expense Estimated

A summary of intangible amortization expense estimated for the five fiscal years following the fiscal year ended December 31, 2016 and thereafter follows:

Estimated Future Amortization Expense as of March 31, 2017
Fiscal year ending December 31, 2017	$	1,455
Fiscal year ending December 31, 2018	$	1,741
Fiscal year ending December 31, 2019	$	1,366
Fiscal year ending December 31, 2020	$	1,168
Fiscal year ending December 31, 2021	$	910
Thereafter	$	832