Intangible Assets (Details) - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2024	Mar. 31, 2023	Mar. 31, 2022
Amortization related to intangible assets
Finite-lived intangible assets, gross	$ 1,272,538	$ 1,639,273
Accumulated amortization	(332,560)	(580,860)
Total	939,978	1,058,413
Gross carrying amount of intangible assets	1,272,538	1,639,528
Intangible assets, net	939,978	1,058,668
Gain on disposal or impairment of assets, net	$ (115,936)	$ (86,888)	$ (94,254)
Gain (loss) on disposition of assets
Amortization related to intangible assets
Impairment, Intangible Asset, Indefinite-Lived (Excluding Goodwill), Statement of Income or Comprehensive Income [Extensible Enumeration]	Gain on disposal or impairment of assets, net
Impairment, Intangible Asset, Finite-Lived, Statement of Income or Comprehensive Income [Extensible Enumeration]		Gain on disposal or impairment of assets, net	Gain on disposal or impairment of assets, net
Corporate and other
Amortization related to intangible assets
Gain on disposal or impairment of assets, net	$ (700)
Water solutions
Amortization related to intangible assets
Gain on disposal or impairment of assets, net	6,900	$ 26,300
Crude oil logistics
Amortization related to intangible assets
Gain on disposal or impairment of assets, net	2,900		$ (5,500)
Trade names
Amortization related to intangible assets
Indefinite-lived intangible assets	0	255
Trade names | Water solutions
Amortization related to intangible assets
Intangible asset impairment, indefinite-lived	$ 300
Customer relationships
Amortization related to intangible assets
Weighted-average remaining amortization period for intangible assets	18 years 7 months 6 days
Finite-lived intangible assets, gross	$ 905,113	1,196,468
Accumulated amortization	(265,621)	(492,002)
Total	$ 639,492	704,466
Customer relationships | Crude oil logistics
Amortization related to intangible assets
Intangible asset impairment, finite-lived		1,600
Customer contracts
Amortization related to intangible assets
Weighted-average remaining amortization period for intangible assets	20 years 3 months 18 days
Finite-lived intangible assets, gross	$ 192,000	192,000
Accumulated amortization	(36,480)	(28,800)
Total	$ 155,520	163,200
Right-of-way and easements
Amortization related to intangible assets
Weighted-average remaining amortization period for intangible assets	29 years 10 months 24 days
Finite-lived intangible assets, gross	$ 95,231	94,875
Accumulated amortization	(18,187)	(15,138)
Total	$ 77,044	79,737
Use rights
Amortization related to intangible assets
Weighted-average remaining amortization period for intangible assets	25 years 7 months 6 days
Finite-lived intangible assets, gross	$ 36,068	99,869
Accumulated amortization	(5,310)	(26,453)
Total	$ 30,758	73,416
Use rights | Water solutions
Amortization related to intangible assets
Gain on disposal or impairment of assets, net			(1,600)
Debt issuance costs
Amortization related to intangible assets
Weighted-average remaining amortization period for intangible assets	4 years 10 months 24 days
Finite-lived intangible assets, gross	$ 18,473	25,592
Accumulated amortization	(605)	(9,921)
Total	$ 17,868	15,671
Debt issuance costs | Corporate and other | Sawtooth Credit Agreement
Amortization related to intangible assets
Write off of debt issuance costs and other expenses			$ 100
Executory contracts and other agreements
Amortization related to intangible assets
Weighted-average remaining amortization period for intangible assets	25 years 2 months 12 days
Finite-lived intangible assets, gross	$ 17,854	21,570
Accumulated amortization	(3,670)	(5,037)
Total	$ 14,184	16,533
Pipeline capacity rights
Amortization related to intangible assets
Weighted-average remaining amortization period for intangible assets	19 years 8 months 12 days
Finite-lived intangible assets, gross	$ 7,799	7,799
Accumulated amortization	(2,687)	(2,427)
Total	5,112	5,372
Non-compete agreements
Amortization related to intangible assets
Finite-lived intangible assets, gross	0	1,100
Accumulated amortization	0	(1,082)
Total	$ 0	$ 18