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SUBSEQUENT EVENTS (Details) - USD ($) $ / shares in Units, $ in Thousands |  | 3 Months Ended
--- | --- | ---
Mar. 02, 2020 | Dec. 31, 2019 | Sep. 30, 2019 | Jun. 30, 2019 | Mar. 31, 2019 | Dec. 31, 2018 | Sep. 30, 2018 | Jun. 30, 2018 | Mar. 31, 2018 | Dec. 31, 2017 | Sep. 30, 2017 | Jun. 30, 2017 | Mar. 31, 2017
Subsequent Event [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Dividends payable, payment date |  | Dec. 16, 2019 | Sep. 16, 2019 | Jun. 17, 2019 | Mar. 25, 2019 | Dec. 10, 2018 | Sep. 17, 2018 | Jun. 18, 2018 | Mar. 26, 2018 | Dec. 11, 2017 | Sep. 18, 2017 | Jun. 20, 2017 | Apr. 03, 2017
Dividends payable, record date |  | Dec. 09, 2019 | Sep. 09, 2019 | Jun. 10, 2019 | Mar. 18, 2019 | Dec. 03, 2018 | Sep. 10, 2018 | Jun. 11, 2018 | Mar. 19, 2018 | Dec. 04, 2017 | Sep. 11, 2017 | Jun. 13, 2017 | Mar. 27, 2017
Revolving Credit Facility | First Tennessee Bank National Association |  |  |  |  |  |  |  |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Outstanding borrowings credit facility |  | $ 4,998 |  |  |  | $ 15,000 |  |  |  |  |  |  |
Subsequent event |  |  |  |  |  |  |  |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Dividends payable, declared date | Mar. 02, 2020 |  |  |  |  |  |  |  |  |  |  |  |
Dividends payable, amount per share | $ 0.18 |  |  |  |  |  |  |  |  |  |  |  |
Dividends payable, payment date | Mar. 23, 2020 |  |  |  |  |  |  |  |  |  |  |  |
Dividends payable, record date | Mar. 16, 2020 |  |  |  |  |  |  |  |  |  |  |  |

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