RELATED PARTY TRANSACTIONS	12 Months Ended
Dec. 31, 2017
Related Party Transactions [Abstract]
RELATED PARTY TRANSACTIONS	RELATED PARTY TRANSACTIONS Services During fiscal years 2017, 2016 and 2015, we retained the services of Casella Construction, Inc. ("CCI"), a company wholly owned by sons of John Casella, our Chairman and Chief Executive Officer, and Douglas Casella, a member of our Board of Directors, as a contractor in developing or closing certain landfills owned by us. Total purchased services charged to operations or capitalized to landfills for fiscal years 2017, 2016 and 2015 were $3,377, $4,024 and $1,341, respectively, of which $30 and $18 were outstanding and included in either accounts payable or other current liabilities as of December 31, 2017 and December 31, 2016, respectively. In addition to the total purchased services, we provided various waste collection and disposal services to CCI. Total revenues recorded for fiscal years 2017, 2016 and 2015 were $237, $307 and $415, respectively. Leases In the fiscal year ended April 30, 1994, we entered into two leases for operating facilities with a partnership of which John Casella, our Chairman and Chief Executive Officer, and Douglas Casella, a member of our Board of Directors, are the general partners. The leases have since been extended through April 2018 with a five year option to extend the terms. The terms of the lease agreements require monthly payments of approximately $28. Total expense charged to operations for fiscal years 2017, 2016 and 2015 under these agreements was $360, $371 and $384, respectively. Landfill Post-closure We have agreed to pay the cost of post-closure on a landfill owned by John Casella, our Chairman and Chief Executive Officer, and Douglas Casella, a member of our Board of Directors. We paid the cost of closing this landfill in 1992, and the post-closure maintenance obligations are expected to last until the fiscal year ending December 31, 2024. In fiscal years 2017, 2016 and 2015, we paid $27, $10 and $9, respectively, pursuant to this agreement. As of December 31, 2017 and December 31, 2016, we have accrued $60 and $70, respectively, for costs associated with its post-closure obligations.

RELATED PARTY TRANSACTIONS

Services

During fiscal years 2017, 2016 and 2015, we retained the services of Casella Construction, Inc. ("CCI"), a company wholly owned by sons of John Casella, our Chairman and Chief Executive Officer, and Douglas Casella, a member of our Board of Directors, as a contractor in developing or closing certain landfills owned by us. Total purchased services charged to operations or capitalized to landfills for fiscal years 2017, 2016 and 2015 were $3,377, $4,024 and $1,341, respectively, of which $30 and $18 were outstanding and included in either accounts payable or other current liabilities as of December 31, 2017 and December 31, 2016, respectively.

In addition to the total purchased services, we provided various waste collection and disposal services to CCI. Total revenues recorded for fiscal years 2017, 2016 and 2015 were $237, $307 and $415, respectively.

Leases

In the fiscal year ended April 30, 1994, we entered into two leases for operating facilities with a partnership of which John Casella, our Chairman and Chief Executive Officer, and Douglas Casella, a member of our Board of Directors, are the general partners. The leases have since been extended through April 2018 with a five year option to extend the terms. The terms of the lease agreements require monthly payments of approximately $28. Total expense charged to operations for fiscal years 2017, 2016 and 2015 under these agreements was $360, $371 and $384, respectively.

Landfill Post-closure

We have agreed to pay the cost of post-closure on a landfill owned by John Casella, our Chairman and Chief Executive Officer, and Douglas Casella, a member of our Board of Directors. We paid the cost of closing this landfill in 1992, and the post-closure maintenance obligations are expected to last until the fiscal year ending December 31, 2024. In fiscal years 2017, 2016 and 2015, we paid $27, $10 and $9, respectively, pursuant to this agreement. As of December 31, 2017 and December 31, 2016, we have accrued $60 and $70, respectively, for costs associated with its post-closure obligations.