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EARNINGS PER COMMON SHARE - Shares of common stock underlying RSUs (Details) - shares
 1 Months Ended 3 Months Ended 6 Months Ended
Jun. 30, 2023
Aug. 31, 2023
Jun. 30, 2022
Jun. 30, 2021
Jun. 30, 2023
Jun. 30, 2022
Jun. 30, 2023
Jun. 30, 2022
Earnings Per Common Share                
Number of underlying shares         241,076 230,752 241,076 230,752
Number of shares included in diluted weighted average number of shares pursuant to return on capital performance metric         120,519 115,376 120,519 115,376
Number of shares in diluted weighted average number of shares pursuant to stockholder return metric         37,494 64,488 37,494 64,488
Total         158,013 179,864 158,013 179,864
Common shares not included in calculation due applicable metric had not been met at measurement dates         83,063 50,888 83,063 50,888
July 1, 2022                
Earnings Per Common Share                
Number of underlying shares         85,350   85,350  
Number of shares included in diluted weighted average number of shares pursuant to return on capital performance metric         42,675   42,675  
Total         42,675   42,675  
Common shares not included in calculation due applicable metric had not been met at measurement dates         42,675   42,675  
August 3, 2021                
Earnings Per Common Share                
Number of underlying shares         80,700 80,700 80,700 80,700
Number of shares included in diluted weighted average number of shares pursuant to return on capital performance metric         40,350 40,350 40,350 40,350
Total         40,350 40,350 40,350 40,350
Common shares not included in calculation due applicable metric had not been met at measurement dates         40,350 40,350 40,350 40,350
August 3, 2020                
Earnings Per Common Share                
Number of underlying shares         75,026 75,026 75,026 75,026
Number of shares included in diluted weighted average number of shares pursuant to return on capital performance metric         37,494 37,513 37,494 37,513
Number of shares in diluted weighted average number of shares pursuant to stockholder return metric         37,494 37,513 37,494 37,513
Total         74,988 75,026 74,988 75,026
Common shares not included in calculation due applicable metric had not been met at measurement dates         38   38  
July 1, 2019                
Earnings Per Common Share                
Number of underlying shares           75,026   75,026
Number of shares included in diluted weighted average number of shares pursuant to return on capital performance metric           37,513   37,513
Number of shares in diluted weighted average number of shares pursuant to stockholder return metric           26,975   26,975
Total           64,488   64,488
Common shares not included in calculation due applicable metric had not been met at measurement dates           10,538   10,538
Restricted stock units                
Earnings Per Common Share                
Number of shares vested 74,988       74,988 64,488 74,988 64,488
Number of shares forfeited 38       38 10,538 38 10,538
Restricted stock units | August 3, 2020                
Earnings Per Common Share                
Number of shares vested             74,988  
Number of shares forfeited             38  
Number of shares issued upon vesting   74,988            
Restricted stock units | July 1, 2019                
Earnings Per Common Share                
Number of shares vested     64,488          
Number of shares forfeited       10,538