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EQUITY STRUCTURE AND ACCOUNTS - Additional Information (Details) - USD ($) | 3 Months Ended |  |  |
--- | --- | --- | --- | ---
Mar. 31, 2020 | Mar. 31, 2019 | Dec. 31, 2019 | Dec. 31, 2018 | Oct. 30, 2014
2014 Share Repurchase Authorization Program |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |
Remaining amount available for repurchase | $ 39,900,000 |  |  |  |
Percentage of aggregate common stock outstanding under Repurchase Program | 7.80% |  |  |  |
Closing price (in dollars per share) | $ 4.74 |  |  |  |
Series REIT LP Units |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |
Exchange of noncontrolling interest for common stock, units exchanged (in shares) | 0 | 101,000 |  |  |
Series TRS LP Units |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |
Exchange of noncontrolling interest for common stock, units exchanged (in shares) | 0 | 101,000 |  |  |
Class A Common Stock |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |
Exchange of noncontrolling interest for common stock (in shares) |  | 101,000 |  |  |
Class A Common Stock | 2014 Share Repurchase Authorization Program |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |
Additional authorizations |  |  |  |  | $ 50,000,000.0
Remaining amount available for repurchase | $ 39,931,000 | $ 41,769,000 | $ 41,132,000 | $ 41,769,000 |
Class B Common Stock |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |
Exchange of noncontrolling interest for common stock (in shares) |  | (101,000) |  |  |

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