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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Tables) | 3 Months Ended
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Mar. 31, 2018
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES |
Schedule of restricted cash and cash equivalents |
|  | March 31, |  | December 31, |  | March 31, |  | December 31, |
|  | 2018 |  | 2017 |  | 2017 |  | 2016 |
Cash and cash equivalents |  | $ | 172,775 |  | $ | 174,479 |  | $ | 138,873 |  | $ | 133,400 |
Restricted cash - current |  |  | 5,447 |  |  | 7,234 |  |  | 7,871 |  |  | 8,242 |
Restricted cash - noncurrent |  |  | 22,977 |  |  | 23,233 |  |  | 27,151 |  |  | 27,426 |
Cash, cash equivalents and restricted cash |  | $ | 201,199 |  | $ | 204,946 |  | $ | 173,895 |  | $ | 169,068 |

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- Definition Tabular disclosure of supplemental cash flow information for the periods presented. + References No definition available. + Details
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