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UNCONSOLIDATED AFFILIATES (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
Schedule of Equity Method Investments [Line Items] |  |  |
Investments in unconsolidated affiliates | $ 801,794 | $ 797,613 | $ 805,032
Equity method goodwill | 16,500 | 16,500 |
Equity in net earnings from investments | 147,720 | 122,520 | 143,241
Impairment of equity investments | 0 | 0 | (37,730)
Natural Gas Gathering And Processing |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |
Investments in unconsolidated affiliates | 27,973 | 27,018 | 22,757
Equity in net earnings from investments | 4,857 | 3,757 | (1,123)
Natural Gas Liquids [Member] |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |
Investments in unconsolidated affiliates | 414,454 | 416,648 | 423,494
Equity in net earnings from investments | 34,643 | 21,000 | 39,938
Unconsolidated Affiliates [Member] |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |
Related Party Transaction, Expenses from Transactions with Related Party | $ 82,800 | 62,800 | 135,400
Northern Border Pipeline [Member] |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |
Net ownership percentage | 50.00% |  |
Investments in unconsolidated affiliates | $ 265,096 | 283,170 |
Equity in net earnings from investments | 71,106 | 64,470 | 75,409
Payments to Acquire Equity Method Investments | $ 0 | 0 | 0
Cash Distribution Percentage of Equity Method Investment | 100.00% |  |
Overland Pass Pipeline Company [Member] |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |
Net ownership percentage | 50.00% |  |
Investments in unconsolidated affiliates | $ 401,244 | 403,011 |
Equity in net earnings from investments | $ 32,519 | 19,434 | 38,618
Cash Distribution Percentage of Equity Method Investment | 100.00% |  |
Overland Pass Pipeline Company [Member] | Natural Gas Liquids [Member] |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |
Net ownership percentage | 50.00% |  |
Roadrunner Gas Transmission [Member] |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |
Net ownership percentage | 50.00% |  |
Investments in unconsolidated affiliates | $ 94,271 | 70,777 |
Equity in net earnings from investments | $ 37,114 | 33,293 | 29,017
Cash Distribution Percentage of Equity Method Investment | 100.00% |  |
Other Unconsolidated Affiliates [Member] |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |
Investments in unconsolidated affiliates | $ 41,183 | 40,655 |
Equity in net earnings from investments | $ 6,981 | $ 5,323 | $ 197
Venice Energy Services Company [Member] | Natural Gas Gathering And Processing |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |
Net ownership percentage |  |  | 10.20%
Impairment of equity investments |  |  | $ (30,500)
ImpairmentOfEquityMethodInvestmentDifferenceBetweenCarryingAmountAndUnderlyingEquity |  |  | $ (22,300)
Chisholm Pipeline Company [Member] | Natural Gas Liquids [Member] |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |
Net ownership percentage |  |  | 50.00%
Impairment of equity investments |  |  | $ (7,200)

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