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Ownership Percentage in General Partner

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Reduction of limited partner equity due to investment in the stock of its Parent. Investment in stock of parent is treated in the same manner as treasury stock.

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The aggregate amount of receivables to be collected from related parties where one party can exercise control or significant influence over another party; including affiliates, owners or officers and their immediate families, pension trusts, and so forth, at the financial statement date. which are usually due within one year (or one business cycle).

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Carrying amount as of the balance sheet date of obligations due all related parties. For classified balance sheets, represents the current portion of such liabilities (due within one year or within the normal operating cycle if longer).

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This element represents the aggregate cost of investments accounted for under the equity method of accounting.

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The percentage of ownership of common stock or equity participation in the investee accounted for under the equity method of accounting.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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Purchases during the period (excluding transactions that are eliminated in consolidated or combined financial statements) with related party.

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Amount of revenue, fees and commissions earned from transactions between (a) a parent company and its subsidiaries; (b) subsidiaries of a common parent; (c) an entity and trusts for the benefit of employees, for example, but not limited to, pension and profit-sharing trusts that are managed by or under the trusteeship of the entity's management; (d) an entity and its principal, owners, management, or members of their immediate families; and (e) affiliates.

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Transactions with Affiliates (Details) $ in Thousands	3 Months Ended				9 Months Ended
Transactions with Affiliates (Details) $ in Thousands	Dec. 31, 2019 USD ($)	Sep. 30, 2019 USD ($)	Jun. 30, 2019 USD ($)	Dec. 31, 2018 USD ($)	Dec. 31, 2019 USD ($)	Dec. 31, 2018 USD ($)	Mar. 31, 2019 USD ($)	Sep. 30, 2018
Transactions with Affiliates
Accounts receivable-affiliates	$ 12,445				$ 12,445		$ 12,867
Accounts payable-affiliates	29,374				29,374		28,469
Ownership interest								50.00%
Number of transactions			2
Investment in NGL Energy Holdings LLC	(1,399)	$ (11,466)	$ (2,361)		15,226	$ 0
WPX Energy
Transactions with Affiliates
Sales to related party	13,888			$ 8,779	36,716	18,550
Purchases from related party	81,578			91,391	247,745	248,718
Accounts receivable-affiliates	3,573				3,573		5,185
Accounts payable-affiliates	28,509				28,509		27,844
SemGroup
Transactions with Affiliates
Sales to related party				257	458	926
Purchases from related party				0	0	1,337
Accounts receivable-affiliates							71
Entities affiliated with management
Transactions with Affiliates
Sales to related party	3,642			4,691	5,362	10,336
Purchases from related party	953			675	3,068	2,481
Accounts receivable-affiliates	540				540		334
Accounts payable-affiliates	629				629		625
NGL Energy Holdings LLC
Transactions with Affiliates
Accounts receivable-affiliates	$ 8,332				$ 8,332		7,277
Ownership interest in NGL Energy Holdings LLC	1.08%	5.73%	1.89%		1.08%
Equity method investee
Transactions with Affiliates
Purchases from related party	$ 188			$ 0	$ 317	$ 0
Accounts payable-affiliates	$ 236				$ 236		$ 0
Aircraft Company \| Operating segment \| Corporate and other \| KAIR2014 LLC
Transactions with Affiliates
Ownership interest			50.00%
Equity method investment, original cost			$ 900