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STOCKHOLDERS' EQUITY - Common Stock Dividend (Details) - USD ($) |  | 1 Months Ended | 3 Months Ended | 6 Months Ended
--- | --- | --- | --- | ---
Jun. 10, 2021 | Jul. 31, 2020 | Jun. 30, 2020 | Jun. 30, 2021 | Mar. 31, 2021 | Jun. 30, 2020 | Mar. 31, 2020 | Jun. 30, 2021 | Jun. 30, 2020
Common Stock Dividend |  |  |  |  |  |  |  |  |
Cash distributions per share of common stock (in dollars per share) | $ 0.45 |  | $ 0.45 | $ 0.45 | $ 0.45 | $ 0.225 | $ 0.45 | $ 0.90 | $ 0.675
Cash dividend declared | $ 9,330,000 |  |  | $ 9,330,000 | $ 9,329,000 | $ 4,535,000 | $ 9,036,000 |  |
Percentage of aggregate dividends declared payable in cash |  |  | 50.00% |  |  |  |  |  |
Aggregate common stock cash and stock dividends paid |  | $ 9,068,000 |  |  |  |  |  |  |
Dividends paid in cash |  | $ 4,537,000 |  |  |  |  |  | $ 18,590,000 | $ 18,003,000
Dividends paid by the issuance of shares |  | 263,229 |  |  |  |  |  |  |
Stock distributions per share of common stock (in dollars per share) |  | $ 17.22 |  |  |  | $ 0.225 |  |  | $ 0.225

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