v3.25.4

Commitments and Contingencies (Tables) | 9 Months Ended
--- | ---
Dec. 31, 2025
Commitments and Contingencies Disclosure [Abstract] |
Schedule of change in asset retirement obligation | The following table summarizes changes in our asset retirement obligations, which is reported within other noncurrent liabilities in our unaudited condensed consolidated balance sheets (in thousands):
Asset retirement obligations at March 31, 2025 | $ | 69,572 |
Liabilities incurred | 8,892 |
Liabilities associated with disposed assets (1) | (402) |
Liabilities settled | (6,546) |
Accretion expense | 3,829 |
Asset retirement obligations at December 31, 2025 | $ | 75,345 |
(1) Relates to the sale of a certain saltwater disposal well within our Water Solutions segment.
Schedule of outstanding purchase commitments | At December 31, 2025, we had the following commodity purchase commitments:
|  | Crude Oil (1) |  | Natural Gas Liquids
|  | Value |  | Volume (in barrels) |  | Value |  | Volume (in gallons)
|  | (in thousands)
Fixed-Price Commodity Purchase Commitments: |  |  |  |  |  |  |  |
Year ending March 31, |  |  |  |  |  |  |  |
2026 (three months) |  | $ | 21,799 |  |  | 373 |  |  | $ | 10,136 |  |  | 13,902 |
2027 |  | — |  |  | — |  |  | 4,328 |  |  | 6,174 |
2028 |  | — |  |  | — |  |  | 1,290 |  |  | 1,890 |
Total |  | $ | 21,799 |  |  | 373 |  |  | $ | 15,754 |  |  | 21,966 |
Index-Price Commodity Purchase Commitments: |  |  |  |  |  |  |  |
Year ending March 31, |  |  |  |  |  |  |  |
2026 (three months) |  | $ | 701,769 |  |  | 12,643 |  |  | $ | 177,336 |  |  | 222,937 |
2027 |  | 303,344 |  |  | 5,576 |  |  | 58,047 |  |  | 82,824 |
2028 |  | 256,780 |  |  | 4,680 |  |  | 18,687 |  |  | 24,150 |
2029 |  | 100,499 |  |  | 1,820 |  |  | — |  |  | — |
2030 |  | 102,663 |  |  | 1,820 |  |  | — |  |  | — |
2031 |  | 31,899 |  |  | 557 |  |  | — |  |  | — |
Thereafter |  | 117,838 |  |  | 2,045 |  |  | — |  |  | — |
Total |  | $ | 1,614,792 |  |  | 29,141 |  |  | $ | 254,070 |  |  | 329,911 |
(1) Our crude oil index-price purchase commitments exceed our crude oil index-price sales commitments (presented above) due primarily to our long-term purchase commitments for crude oil that we purchase and ship on the Grand Mesa Pipeline.
Schedule of outstanding sale commitments | At December 31, 2025, we had the following commodity sale commitments:
|  | Crude Oil |  | Natural Gas Liquids
|  | Value |  | Volume (in barrels) |  | Value |  | Volume (in gallons)
|  | (in thousands)
Fixed-Price Commodity Sale Commitments: |  |  |  |  |  |  |  |
Year ending March 31, |  |  |  |  |  |  |  |
2026 (three months) |  | $ | 21,940 |  |  | 372 |  |  | $ | 33,419 |  |  | 36,382 |
2027 |  | — |  |  | — |  |  | 9,228 |  |  | 11,380 |
2028 |  | — |  |  | — |  |  | 1,409 |  |  | 1,903 |
2029 |  | — |  |  | — |  |  | 19 |  |  | 19 |
2030 |  | — |  |  | — |  |  | 19 |  |  | 19 |
Total |  | $ | 21,940 |  |  | 372 |  |  | $ | 44,094 |  |  | 49,703 |
Index-Price Commodity Sale Commitments: |  |  |  |  |  |  |  |
Year ending March 31, |  |  |  |  |  |  |  |
2026 (three months) |  | $ | 645,908 |  |  | 11,162 |  |  | $ | 188,672 |  |  | 187,388 |
2027 |  | 118,980 |  |  | 2,088 |  |  | 75,778 |  |  | 74,869 |
2028 |  | 72,918 |  |  | 1,266 |  |  | 366 |  |  | 570 |
2029 |  | 74,595 |  |  | 1,263 |  |  | — |  |  | — |
2030 |  | 75,862 |  |  | 1,263 |  |  | — |  |  | — |
Total |  | $ | 988,263 |  |  | 17,042 |  |  | $ | 264,816 |  |  | 262,827 |
Schedule of future minimum payments under contractual commitments | The following table summarizes future minimum payments under these agreements at December 31, 2025 (in thousands):
Year Ending March 31, |
2026 (three months) | $ | 1,403 |
2027 | 5,498 |
2028 | 4,647 |
2029 | 2,653 |
2030 | 1,664 |
2031 | 1,408 |
Thereafter | 1,154 |
Total | $ | 18,427 |

X
- Definition Tabular disclosure of unconditional sales obligations, including the nature and significant terms of an unconditional sales obligation; the amount of the fixed and determinable portion of the obligation as of the date of the latest balance sheet presented in the aggregate and, if determinable, for each of the five succeeding fiscal years; the nature of any variable components of the obligation; the sale amount under the obligation for the reporting period; and may include the amount of imputed interest necessary to reduce the obligation to present value. + References No definition available. + Details
Name: | ngl_UnrecordedUnconditionalSaleObligationsDisclosureTableTextBlock
Namespace Prefix: | ngl_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- References No definition available. + Details
Name: | us-gaap_CommitmentsAndContingenciesDisclosureAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of information about obligations resulting from other commitments. + References No definition available. + Details
Name: | us-gaap_OtherCommitmentsTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of the changes in carrying amount of a liability for asset retirement obligations, for changes such as new obligations, changes in estimates of existing obligations, spending on existing obligations, property dispositions, and foreign currency translation. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 410 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (c) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481850/410-20-50-1 + Details
Name: | us-gaap_ScheduleOfChangeInAssetRetirementObligationTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of unconditional purchase obligation not recognized as liability. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 440 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 4 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482648/440-10-50-4 + Details
Name: | us-gaap_UnrecordedUnconditionalPurchaseObligationsDisclosureTextBlock
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration