GOODWILL AND INTANGIBLE ASSETS (Tables)

3 Months Ended

Mar. 31, 2018

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, 2017		Acquisitions		March 31, 2018
Eastern region (1)	$	19,192	$	6,008	$	25,200
Western region	89,369		1,704		91,073
Recycling	12,315		—		12,315
Other	1,729		—		1,729
Total	$	122,605	$	7,712	$	130,317

(1) Includes a $1,635 goodwill adjustment for the tax treatment associated with the Complete acquisition. See Note 13, Income Taxes.

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, 2018
Intangible assets	$	19,192		$	19,687		$	38,879
Less accumulated amortization	(17,025		)	(11,572		)	(28,597		)
	$	2,167		$	8,115		$	10,282

	Covenants Not-to-Compete			Client Lists			Total
Balance, December 31, 2017
Intangible assets	$	18,092		$	18,087		$	36,179
Less accumulated amortization	(16,851		)	(11,179		)	(28,030		)
	$	1,241		$	6,908		$	8,149

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, 2017 and thereafter follows:

Estimated Future Amortization Expense as of March 31, 2018
Fiscal year ending December 31, 2018	$	1,674
Fiscal year ending December 31, 2019	$	1,975
Fiscal year ending December 31, 2020	$	1,897
Fiscal year ending December 31, 2021	$	1,583
Fiscal year ending December 31, 2022	$	1,227
Thereafter	$	1,926