Income (Loss) Per Common Unit (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		6 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024
Income (Loss) Per Common Unit
Income from continuing operations	$ 29,812	$ 7,493	$ 60,077	$ 25,096
Less: Net income from continuing operations attributable to nonredeemable noncontrolling interests	(490)	(932)	(1,195)	(1,724)
Less: Net income from continuing operations attributable to redeemable noncontrolling interests	(47)	(5)	(64)	(5)
Net income from continuing operations attributable to NGL Energy Partners LP	29,275	6,556	58,818	23,367
Less: Distributions to preferred unitholders (1)	(26,136)	(30,752)	(89,736)	(59,566)
Less: Net (income) loss from continuing operations allocated to the GP (2)	(2)	24	31	36
Net Income (Loss) from Continuing Operations Available to Common Shareholders, Basic	3,137	(24,172)	(30,887)	(36,163)
Net Income (Loss) from Continuing Operations Available to Common Shareholders, Diluted	3,137	(24,172)	(30,887)	(36,163)
Income (Loss) From Discontinued Operations, net of Tax	9	(4,102)	39,388	(11,230)
Less: Net loss (income) from discontinued operations allocated to the GP (2)	0	4	(39)	11
Net Income (Loss) from Discontinued Operations Allocated to Common Unitholders, Basic	9	(4,098)	39,349	(11,219)
Net Income (Loss) from Discontinued Operations Allocated to Common Unitholders, Diluted	9	(4,098)	39,349	(11,219)
NET INCOME (LOSS) ALLOCATED TO COMMON UNITHOLDERS (NOTE 3)	$ 3,146	$ (28,270)	$ 8,462	$ (47,382)
Limited Partner
Income (Loss) Per Common Unit
Basic weighted average common units outstanding (in units)	127,309,332	132,274,669	129,516,312	132,393,067
DILUTED WEIGHTED AVERAGE COMMON UNITS OUTSTANDING (in units)	127,309,332	132,274,669	129,516,312	132,393,067
Income (loss) from continuing operations, basic	$ 0.02	$ (0.18)	$ (0.24)	$ (0.27)
Income (loss) from continuing operations, diluted	0.02	(0.18)	(0.24)	(0.27)
(Loss) income from discontinued operations, net of tax, basic	0	(0.03)	0.30	(0.08)
(Loss) income from discontinued operations, net of tax, diluted	0	(0.03)	0.30	(0.08)
Basic income (loss) per common unit	0.02	(0.21)	0.07	(0.36)
Diluted income (loss) per common unit	$ 0.02	$ (0.21)	$ 0.07	$ (0.36)