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FAIR VALUE MEASUREMENTS - Estimated FV (Details)
1 Months Ended 2 Months Ended 3 Months Ended 12 Months Ended
Oct. 31, 2019
Dec. 31, 2019
Mar. 31, 2020
Mar. 31, 2019
Dec. 31, 2019
Oct. 01, 2019
Aug. 02, 2019
Fair value measurements              
Financial Designation, Predecessor and Successor [Fixed List] Successor Successor Successor Predecessor Successor    
6.75% senior notes due 2025              
Fair value measurements              
Interest rate (as a percent)           6.75% 6.75%