UNCONSOLIDATED AFFILIATES (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Schedule of Equity Method Investments [Line Items]
Equity in net earnings from investments	$ 35,630	$ 25,720	$ 71,970	$ 59,040
Unconsolidated Affiliates [Member]
Schedule of Equity Method Investments [Line Items]
Related Party Transaction, Expenses from Transactions with Related Parties	15,600	12,500	30,100	28,000
Northern Border Pipeline
Schedule of Equity Method Investments [Line Items]
Equity in net earnings from investments	16,347	12,586	36,472	32,825
Roadrunner
Schedule of Equity Method Investments [Line Items]
Equity in net earnings from investments	9,300	7,602	18,441	15,351
Overland Pass Pipeline
Schedule of Equity Method Investments [Line Items]
Equity in net earnings from investments	7,885	4,739	12,893	7,711
Other Unconsolidated Affiliates
Schedule of Equity Method Investments [Line Items]
Equity in net earnings from investments	$ 2,098	$ 793	$ 4,164	$ 3,153