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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%

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- Definition Indicates designation of financial information when substantially all business or separately identifiable line of business transfers from one entity to another entity. Acceptable values are "Predecessor" and "Successor". + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 852 -SubTopic 10 -Section 45 -Paragraph 27 -URI http://asc.fasb.org/extlink&oid=116635682&loc=SL2890601-112764 + Details
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