This item represents the carrying amount on the entity's balance sheet of its investment in common stock of an equity method investee. This is not an indicator of the fair value of the investment, rather it is the initial cost adjusted for the entity's share of earnings and losses of the investee, adjusted for any distributions (dividends) and other than temporary impairment (OTTI) losses recognized.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
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-SubTopic 10
-Section 45
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=109237563&loc=d3e33749-111570

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 25
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=123359005&loc=d3e8813-108599

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

Equity Method Investments - Schedule of Equity Method Investments (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020	May 31, 2019
Schedule of Equity Method Investments [Line Items]
Equity method investments	$ 250,030	$ 253,675
Red River
Schedule of Equity Method Investments [Line Items]
Equity method investments	144,041	141,803	$ 124,700
CP LLC
Schedule of Equity Method Investments [Line Items]
Equity method investments	61,670	62,771
Andeavor Logistics
Schedule of Equity Method Investments [Line Items]
Equity method investments	$ 44,319	$ 49,101