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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details) - USD ($) $ in Thousands | 12 Months Ended |
--- | --- | ---
Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017 | Jan. 01, 2019
Entity [Line Items] |  |  |  |
Equity Method Investment, Ownership Percentage | 50.00% |  |  |
Contract Liabilities, Contract Term | 5 to 10 years |  |  |
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent | 21.00% | 21.00% | 35.00% |
General partner ownership interest | 100.00% |  |  |
Common stock | $ 29,040 | $ 1,203,981 | $ 471,358 |
Noncontrolling interests in consolidated subsidiaries |  | $ (195,000) | $ 2,146,462 |
Number Of Years Of Service Employees Must Work To Be Entitled To Postretirement Medical And Life Insurance Benefits |  |  | 5 years |
Accounting Standards Update 2016-02 [Member] |  |  |  |
Entity [Line Items] |  |  |  |
Finance lease assets - PPE |  |  |  | $ 28,100
Present value of lease liabilities |  |  |  | $ 28,000

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- Definition Number Of Years Of Service Employees Must Work To Be Entitled To Postretirement Medical And Life Insurance Benefits + References No definition available. + Details
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