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ACQUISITIONS AND DIVESTITURES - Water Infrastructure Assets (Details) - USD ($) $ in Thousands |  |  | 12 Months Ended
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Dec. 20, 2018 | Oct. 01, 2018 | Dec. 31, 2018
ACQUISITIONS AND DIVESTITURES |  |  |
Gain (loss) from sale of other operating property and equipment |  |  | $ 119,003
Water Infrastructure Assets | Purchase and Sale Agreement |  |  |
ACQUISITIONS AND DIVESTITURES |  |  |
Sale price of asset in cash | $ 214,100 |  |
Incentives payable per year if certain thresholds are met |  | $ 25,000 |
Deferred period of sale price based on certain thresholds |  | 5 years |
(Gain) loss on sale of Water Assets | Water Infrastructure Assets | Purchase and Sale Agreement |  |  |
ACQUISITIONS AND DIVESTITURES |  |  |
Gain (loss) from sale of other operating property and equipment |  |  | $ 119,000

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- Definition The period over which the amount of agreed contingent cash price of sale of assets is paid, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References No definition available. + Details
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- Definition Amount of gain (loss) on sale or disposal of property, plant and equipment assets, including oil and gas property and timber property. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3602-108585 + Details
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