REVENUE RECOGNITION

6 Months Ended

Jun. 30, 2019

Revenue from Contract with Customer [Abstract]

A table of revenues disaggregated by service line and timing of revenue recognition by operating segment for each of the three and six months ended June 30, 2019 and 2018 follows:

Three Months Ended June 30, 2019



	Eastern		Western		Recycling		Other		Total Revenues
Collection	$	38,955	$	54,151	$	—	$	—	$	93,106
Landfill	5,427		18,855		—		—		24,282
Transfer	11,923		8,597		—		—		20,520
Customer solutions	—		—		—		19,216		19,216
Recycling	577		341		10,514		—		11,432
Organics	—		—		—		14,905		14,905
Transportation	—		2,895		—		392		3,287
Landfill gas-to-energy	194		517		—		—		711
Total revenues	$	57,076	$	85,356	$	10,514	$	34,513	$	187,459

Transferred at a point-in-time	$	52	$	178	$	5,051	$	1,454	$	6,735
Transferred over time	57,024		85,178		5,463		33,059		180,724
Total revenues	$	57,076	$	85,356	$	10,514	$	34,513	$	187,459

Three Months Ended June 30, 2018



	Eastern		Western		Recycling		Other		Total Revenues
Collection	$	34,625	$	40,869	$	—	$	—	$	75,494
Landfill	7,883		16,200		—		—		24,083
Transfer	10,745		8,011		—		—		18,756
Customer solutions	—		—		—		15,950		15,950
Recycling	—		1,445		9,600		—		11,045
Organics	—		—		—		14,647		14,647
Transportation	—		3,559		—		820		4,379
Landfill gas-to-energy	336		959		—		—		1,295
Total revenues	$	53,589	$	71,043	$	9,600	$	31,417	$	165,649

Transferred at a point-in-time	$	181	$	246	$	5,618	$	1,725	$	7,770
Transferred over time	53,408		70,797		3,982		29,692		157,879
Total revenues	$	53,589	$	71,043	$	9,600	$	31,417	$	165,649

Six Months Ended June 30, 2019



	Eastern		Western		Recycling		Other		Total Revenues
Collection	$	72,919	$	103,746	$	—	$	—	$	176,665
Landfill	9,144		34,323		—		—		43,467
Transfer	20,909		13,872		—		—		34,781
Customer solutions	—		—		—		37,370		37,370
Recycling	578		782		21,280		—		22,640
Organics	—		—		—		28,501		28,501
Transportation	—		4,942		—		910		5,852
Landfill gas-to-energy	523		1,324		—		—		1,847
Total revenues	$	104,073	$	158,989	$	21,280	$	66,781	$	351,123

Transferred at a point-in-time	$	88	$	487	$	11,175	$	1,721	$	13,471
Transferred over time	103,985		158,502		10,105		65,060		337,652
Total revenues	$	104,073	$	158,989	$	21,280	$	66,781	$	351,123

Six Months Ended June 30, 2018



	Eastern		Western		Recycling		Other		Total Revenues
Collection	$	65,149	$	77,353	$	—	$	—	$	142,502
Landfill	13,843		30,740		—		—		44,583
Transfer	18,304		13,617		—		—		31,921
Customer solutions	—		—		—		31,119		31,119
Recycling	—		2,394		19,757		—		22,151
Organics	—		—		—		26,847		26,847
Transportation	—		9,383		—		1,504		10,887
Landfill gas-to-energy	798		2,296		—		—		3,094
Total revenues	$	98,094	$	135,783	$	19,757	$	59,470	$	313,104

Transferred at a point-in-time	$	372	$	614	$	12,875	$	2,082	$	15,943
Transferred over time	97,722		135,169		6,882		57,388		297,161
Total revenues	$	98,094	$	135,783	$	19,757	$	59,470	$	313,104

Payments to customers that are not in exchange for a distinct good or service are recorded as a reduction of revenues. Rebates to certain customers associated with payments for recycled or organic materials that are received and subsequently processed and sold to other third-parties amounted to $1,109 and $2,447 in the three and six months ended June 30, 2019, respectively, and $1,616 and $3,084 in the three and six months ended June 30, 2018, respectively. Rebates are generally recorded as a reduction of revenues upon the sale of such materials, or upon receipt of the recycled materials at our facilities. These payments were previously recorded as a cost of operations. We did not record any revenues in the three and six months ended June 30, 2019 and June 30, 2018 from performance obligations satisfied in previous periods.

Contract receivables, which are included in Accounts receivable - trade, net are recorded when billed or when related revenue is earned, if earlier, and represent claims against third-parties that will be settled in cash. Accounts receivable - trade, net includes gross receivables from contracts of $83,942 and $73,500 as of June 30, 2019 and December 31, 2018, respectively. Certain customers are billed in advance and, accordingly, recognition of the related revenues is deferred as a contract liability until the services are provided and control transferred to the customer. We recognized contract liabilities of $2,644 and $3,074 as of June 30, 2019 and December 31, 2018, respectively. Due to the short term nature of advanced billings, substantially all of the deferred revenue recognized as a contract liability as of December 31, 2018 and December 31, 2017 were recognized as revenue during the three and six months ended June 30, 2019 and June 30, 2018, respectively, when the services were performed.