GOODWILL AND INTANGIBLE ASSETS (Tables)

9 Months Ended

Sep. 30, 2016

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, 2015		Acquisitions		September 30, 2016
Eastern region	$	17,429	$	—	$	17,429
Western region	87,503		923		88,426
Recycling	12,315		—		12,315
Other	1,729		—		1,729
Total	$	118,976	$	923	$	119,899

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, September 30, 2016
Intangible assets	$	17,594		$	16,071		$	33,665
Less accumulated amortization	(16,288		)	(9,145		)	(25,433		)
	$	1,306		$	6,926		$	8,232

	Covenants Not-to-Compete			Client Lists			Total
Balance, December 31, 2015
Intangible assets	$	17,266		$	16,065		$	33,331
Less accumulated amortization	(16,198		)	(7,881		)	(24,079		)
	$	1,068		$	8,184		$	9,252

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, 2015 and thereafter follows:

Estimated Future Amortization Expense as of September 30, 2016
Fiscal year ending December 31, 2016	$	531
Fiscal year ending December 31, 2017	$	1,901
Fiscal year ending December 31, 2018	$	1,698
Fiscal year ending December 31, 2019	$	1,330
Fiscal year ending December 31, 2020	$	1,137
Thereafter	$	1,635