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ASSET RETIREMENT OBLIGATIONS AND RESTRICTED CASH (Tables)

3 Months Ended

Mar. 31, 2020

Asset Retirement Obligation Disclosure [Abstract]

Schedule of Change in Asset Retirement Obligation

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

	March 31, 2020				December 31, 2019
Asset retirement obligation, beginning of period	$	18,972			$	19,104
Revision of estimate	—				(2,063		)
Accretion of liabilities	478				1,931
Asset retirement obligation, end of period	$	19,450			$	18,972
Asset retirement obligation:
Current	$	46			$	46
Non-current	19,404				18,926
Asset retirement obligation, end of period	$	19,450			$	18,972

Schedule of Restricted Cash and Cash Equivalents

Cash, cash equivalents and restricted cash are included in the following accounts at March 31, 2020 and December 31, 2019:

	March 31, 2020				December 31, 2018
Cash and cash equivalents	$	23,537			$	12,810
Restricted cash included in other long-term assets	20,126				20,081
Total cash, cash equivalents and restricted cash	$	43,663			$	32,891

The following table summarizes the Company’s restricted cash:

	March 31, 2020				December 31, 2019
Restricted cash, beginning of period	$	20,081			$	19,652
Additional collateral posted	45				429
Restricted cash, end of period	$	20,126			$	20,081

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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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