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SUBSEQUENT EVENTS (Details) - USD ($)
$ / shares in Units, $ in Thousands
3 Months Ended 12 Months Ended
Mar. 20, 2023
Mar. 13, 2023
Mar. 06, 2023
Dec. 31, 2022
Sep. 30, 2022
Jun. 30, 2022
Mar. 31, 2022
Dec. 31, 2021
Sep. 30, 2021
Jun. 30, 2021
Mar. 31, 2021
Dec. 31, 2020
Sep. 30, 2020
Jun. 30, 2020
Mar. 31, 2020
Dec. 31, 2022
Oct. 28, 2022
Dec. 21, 2020
Subsequent Event [Line Items]                                    
Share-Based Compensation Arrangement By Share-Based Payment Award, Award Vesting Period                               5 years    
Dividends payable, payment date       Dec. 12, 2022 Sep. 12, 2022 Jun. 13, 2022 Mar. 28, 2022 Dec. 13, 2021 Sep. 13, 2021 Jun. 14, 2021 Mar. 22, 2021 Dec. 14, 2020 Sep. 14, 2020 Jun. 15, 2020 Mar. 23, 2020      
Dividends payable, record date       Dec. 05, 2022 Sep. 05, 2022 Jun. 06, 2022 Mar. 21, 2022 Dec. 06, 2021 Sep. 03, 2021 Jun. 07, 2021 Mar. 15, 2021 Dec. 07, 2020 Sep. 07, 2020 Jun. 08, 2020 Mar. 16, 2020      
First Tennessee Bank National Association | Credit facility                                    
Subsequent Event [Line Items]                                    
Revolving credit facility                                 $ 100,000 $ 50,000
Subsequent Event                                    
Subsequent Event [Line Items]                                    
Dividends payable, declared date     Mar. 06, 2023                              
Dividends payable, amount per share     $ 0.18                              
Dividends payable, payment date Mar. 27, 2023                                  
Dividends payable, record date   Mar. 20, 2023