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STOCKHOLDERS' EQUITY (Narrative) (Details) - USD ($) $ / shares in Units, $ in Millions |  | 3 Months Ended |
--- | --- | --- | ---
Jun. 09, 2020 | Mar. 31, 2021 | Dec. 31, 2020
Accumulated Other Comprehensive Income (Loss) [Line Items] |  |  |
Preferred stock, shares authorized |  | 500,000 | 500,000
Preferred stock, shares outstanding |  | 17,250 | 17,250
Depositary Shares |  |  |
Accumulated Other Comprehensive Income (Loss) [Line Items] |  |  |
Shares issued and sold | 6,900,000 |  |
Number of shares to be purchased upon the exercise of options | 900,000 |  |
Preferred stock, liquidation preference (usd per share) | $ 25 |  |
Series A Preferred Stock |  |  |
Accumulated Other Comprehensive Income (Loss) [Line Items] |  |  |
Number of preferred stock represented by each depositary share |  | The Series A preferred stock is represented by depositary shares, each representing a 1/400th ownership interest in a share of Series A preferred stock |
Preferred stock, liquidation preference (usd per share) | $ 10,000 |  |
Net proceeds from issuance of preferred stock | $ 166.4 |  |

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