Percentage of dividends declared of the total dividends earned and outstanding.

No definition available.

Name:	ngl_DividendsDeclaredPercentageOfDividendsInArrears
Namespace Prefix:	ngl_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Represents the reference rate for the variable rate associated with the preferred unit distribution

+ References

No definition available.

+ Details

Name:	ngl_PreferredUnitDistributionVariableRateBasis
Namespace Prefix:	ngl_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Amount of paid and unpaid preferred stock dividends declared with the form of settlement in cash.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Topic 505
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.3-04)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480008/505-10-S99-1

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Section 45
-Paragraph 2
-SubTopic 405
-Topic 942
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147477787/942-405-45-2

+ Details

Name:	us-gaap_DividendsPreferredStockCash
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Indicates type of variable interest rate of investment.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 946
-SubTopic 320
-Name Accounting Standards Codification
-Section S99
-Paragraph 2
-Subparagraph (SX 210.12-12A(Column A)(Footnote 3))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147477271/946-320-S99-2

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 946
-SubTopic 320
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.12-12(Column A)(Footnote 4))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147477271/946-320-S99-1

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Topic 946
-SubTopic 320
-Name Accounting Standards Codification
-Section S99
-Paragraph 3
-Subparagraph (SX 210.12-12B(Column A)(Footnote 3))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147477271/946-320-S99-3

Reference 4: http://www.xbrl.org/2003/role/disclosureRef
-Topic 946
-SubTopic 320
-Name Accounting Standards Codification
-Section S99
-Paragraph 6
-Subparagraph (SX 210.12-14(Column A)(Footnote 3))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147477271/946-320-S99-6

+ Details

Name:	us-gaap_InvestmentVariableInterestRateTypeExtensibleEnumeration
Namespace Prefix:	us-gaap_
Data Type:	enum2:enumerationSetItemType
Balance Type:	na
Period Type:	instant

- Definition

Specific information regarding dividend payment dates or timing and whether or not dividends are paid on a cumulative basis.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(27))
-SubTopic 10
-Topic 210
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Topic 210
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(28))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section 50
-Paragraph 3
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481112/505-10-50-3

+ Details

Name:	us-gaap_PreferredStockDividendPaymentTerms
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Aggregate dividends declared during the period for each share of preferred stock outstanding.

+ References

No definition available.

+ Details

Name:	us-gaap_PreferredStockDividendsPerShareDeclared
Namespace Prefix:	us-gaap_
Data Type:	dtr-types:perShareItemType
Balance Type:	na
Period Type:	duration

- Definition

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.

+ References

No definition available.

+ Details

Name:	us-gaap_PreferredUnitsLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

The number of preferred units outstanding.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Topic 505
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 5
-Subparagraph (SAB Topic 4.F)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480008/505-10-S99-5

+ Details

Name:	us-gaap_PreferredUnitsOutstanding
Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	instant

- Details

Name:	us-gaap_PartnerCapitalComponentsAxis=us-gaap_SeriesBPreferredStockMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_SubsequentEventTypeAxis=us-gaap_SubsequentEventMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Equity - Class B Preferred Units (Details) - USD ($) $ / shares in Units, $ in Thousands												3 Months Ended									12 Months Ended
	Apr. 15, 2026	Jan. 15, 2026	Oct. 15, 2025	Jul. 15, 2025	Apr. 15, 2025	Jan. 15, 2025	Oct. 15, 2024	Jul. 15, 2024	Apr. 25, 2024	Apr. 18, 2024	Feb. 27, 2024	Mar. 31, 2026	Dec. 31, 2025	Sep. 30, 2025	Jun. 30, 2025	Mar. 31, 2025	Dec. 31, 2024	Sep. 30, 2024	Jun. 30, 2024	Mar. 31, 2024	Mar. 31, 2026	Apr. 04, 2024	Feb. 06, 2024
Preferred Units
Investment, Variable Interest Rate, Type [Extensible Enumeration]												Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate	Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate	Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate	Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate	Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate	Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate	Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate	Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate		Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate
Series B Preferred Stock
Preferred Units
Preferred units, issued and outstanding (in units)												12,585,642									12,585,642
Preferred unit distributions declared, percentage of distributions in arrears																						55.40%	50.00%
Preferred unit distributions paid		$ 9,014	$ 9,255	$ 9,261	$ 9,284	$ 9,493	$ 10,073	$ 10,261	$ 31,100	$ 38,000	$ 55,900									$ 9,900
Preferred unit distributions declared									$ 2.4750	$ 3.0224		$ 0.6960	$ 0.7162	$ 0.7353	$ 0.7358	$ 0.7377	$ 0.7542	$ 0.8004	$ 0.8153
Preferred units, dividend payment terms																					The current distribution rate for the Class B Preferred Units is the three-month CME Term SOFR interest rate, which is calculated and published by CME Group Benchmark Administration, Ltd., plus a spread of 7.213%. The Class B Preferred Units also have an additional tenor spread adjustment of 0.26161%, in accordance with the Adjustable Interest Rate (LIBOR) Act.
Preferred unit distribution variable rate basis												3.661%	3.985%	4.291%	4.298%	4.329%	4.593%	5.332%	5.30%		3.661%
Series B Preferred Stock \| Subsequent Event
Preferred Units
Preferred unit distributions paid	$ 8,759