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ASSET RETIREMENT OBLIGATIONS AND RESTRICTED CASH (Tables)

9 Months Ended

Sep. 30, 2019

Asset Retirement Obligation Disclosure [Abstract]

Schedule of Change in Asset Retirement Obligation

The following table summarizes the Company’s asset retirement obligations:

	September 30, 2019				December 31, 2018
Asset retirement obligation, beginning of period	$	19,104			$	18,280
Revision of estimate	151				(662		)
Accretion of liabilities	1,478				1,835
Settlements	—				(349		)
Asset retirement obligation, end of period	$	20,733			$	19,104
Asset retirement obligation:
Current	$	32			$	270
Non-current	20,701				18,834
Asset retirement obligation, end of period	$	20,733			$	19,104

Schedule of Restricted Cash and Cash Equivalents

Cash, cash equivalents and restricted cash are included in the following accounts at September 30, 2019 and December 31, 2018:

	September 30, 2019				December 31, 2018
Cash and cash equivalents	$	14,728			$	14,640
Restricted cash included in other long-term assets	20,054				19,652
Total cash, cash equivalents and restricted cash	$	34,782			$	34,292

The following table summarizes the Company’s restricted cash:

	September 30, 2019				December 31, 2018
Restricted cash, beginning of period	$	19,652			$	22,127
Additional collateral posted	402				117
Refunds of collateral	—				(2,592		)
Restricted cash, end of period	$	20,054			$	19,652

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- Definition

Tabular disclosure of the changes in carrying amount of a liability for asset retirement obligations, for changes such as new obligations, changes in estimates of existing obligations, spending on existing obligations, property dispositions, and foreign currency translation.

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Tabular disclosure of cash and cash equivalents restricted as to withdrawal or usage.

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