COMMITMENTS AND CONTINGENCIES (Tables)

12 Months Ended

Dec. 31, 2017

Commitments and Contingencies Disclosure [Abstract]

Schedule of future minimum rental payments for operating leases

As of December 31, 2017, future minimum lease commitments under non-cancelable operating leases, which will be expensed as primarily in office and general expenses, were as follows:

2018	$	15,282
2019	10,124
2020	6,267
2021	1,892
2022	322
Thereafter	971
	$	34,858

Schedule of asset retirement obligations

The Company’s asset retirement obligations that are included in the Consolidated Balance Sheets as of December 31, 2017 and 2016 were as follows:

	As of December 31,
	2017		2016
Current portion of asset retirement obligations	$	77	$	78
Non-current portion of asset retirement obligations	1,942		1,693
Total asset retirement obligations	$	2,019	$	1,771