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ACCOUNTING CHANGES (Details) - USD ($) $ in Thousands | 12 Months Ended |
--- | --- | ---
Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016 | Jan. 01, 2019
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |
Reclassification of restricted cash | $ (164,197) | $ (76,447) | $ (62,964) |
Restatement adjustment | Accounting Standards Update 2016-18 |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |
Reclassification of restricted cash |  |  | $ (1,347) |
Scenario, forecast | Minimum | Accounting Standards Update 2016-02 |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |
Right-of-use asset |  |  |  | $ 106
Lease liability |  |  |  | 76
Scenario, forecast | Maximum | Accounting Standards Update 2016-02 |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |
Right-of-use asset |  |  |  | 121
Lease liability |  |  |  | $ 91

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