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COMPREHENSIVE INCOME (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2021
Mar. 31, 2021
Jun. 30, 2020
Mar. 31, 2020
Jun. 30, 2021
Jun. 30, 2020
COMPREHENSIVE INCOME [Abstract]            
Balance at Beginning of Period $ (2,538) $ (10,752) $ (12,983) $ 2,807 $ (10,752) $ 2,807
Other comprehensive income (loss) - interest rate swaps (1,263) 8,214 (1,824) (15,790) 6,951 (17,614)
Balance at End of Period $ (3,801) $ (2,538) $ (14,807) $ (12,983) $ (3,801) $ (14,807)