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ASSET RETIREMENT OBLIGATIONS AND RESTRICTED CASH (Tables) | 12 Months Ended
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Dec. 31, 2016
Asset Retirement Obligation Disclosure [Abstract] |
Schedule of Change in Asset Retirement Obligation | The following table summarizes the Company’s asset retirement obligations:
| December 31, 2016 |  | December 31, 2015
Asset retirement obligation, beginning of period | $ | 8,573 |  |  | $ | 5,683 |
Revision of estimate | 4,186 |  |  | 877 |
Acquired in asset acquisitions or business combinations | 5,454 |  |  | 2,145 |
Accretion of liabilities | 906 |  |  | 494 |
Settlements | (2,086 | ) |  | (626 | )
Asset retirement obligation, end of period | $ | 17,033 |  |  | $ | 8,573 |
Asset retirement obligation: |  |  |
Current | $ | 32 |  |  | $ | 1,000 |
Non-current | 17,001 |  |  | 7,573 |
Asset retirement obligation, end of period | $ | 17,033 |  |  | $ | 8,573 |
Schedule of Restricted Cash and Cash Equivalents | The following table summarizes the Company’s restricted cash:
| December 31, 2016 |  | December 31, 2015
Restricted cash, beginning of period | $ | 12,980 |  |  | $ | 16,148 |
Restricted cash from acquisitions | 4,532 |  |  | 2,100 |
Refunds of collateral | — |  |  | (5,268 | )
Additional collateral posted | 5,663 |  |  | — |
Restricted cash, end of period | $ | 23,175 |  |  | $ | 12,980 |

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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. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 410 -SubTopic 30 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=6393242&loc=d3e13201-110859 + Details
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- Definition Tabular disclosure of the cash and cash items which are restricted as to withdrawal or usage. The provisions of any restrictions are described in a note to the financial statements. Restrictions may include legally restricted deposits held as compensating balances against short-term borrowing arrangements, contracts entered into with others, or entity statements of intention with regard to particular deposits; however, time deposits and short-term certificates of deposit are not generally included in legally restricted deposits. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.1) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Cash Equivalents -URI http://asc.fasb.org/extlink&oid=6507016 + Details
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