Intangible Assets (Details) - USD ($) $ in Thousands	Jun. 30, 2023	Mar. 31, 2023
Amortizable
Finite-lived intangible assets, gross	$ 1,639,133	$ 1,639,273
Accumulated amortization	(600,613)	(580,860)
Total	1,038,520	1,058,413
Gross carrying amount of intangible assets	1,639,388	1,639,528
Intangible assets, net of accumulated amortization	1,038,775	1,058,668
Trade names
Non-Amortizable
Indefinite-lived intangible assets	$ 255	255
Customer relationships
Amortizable
Weighted-average remaining amortization period for intangible assets	18 years 9 months 18 days
Finite-lived intangible assets, gross	$ 1,196,468	1,196,468
Accumulated amortization	(506,390)	(492,002)
Total	$ 690,078	704,466
Customer contracts
Amortizable
Weighted-average remaining amortization period for intangible assets	21 years
Finite-lived intangible assets, gross	$ 192,000	192,000
Accumulated amortization	(30,720)	(28,800)
Total	$ 161,280	163,200
Service Agreements
Amortizable
Weighted-average remaining amortization period for intangible assets	20 years 4 months 24 days
Finite-lived intangible assets, gross	$ 7,799	7,799
Accumulated amortization	(2,492)	(2,427)
Total	$ 5,307	5,372
Contract-Based Intangible Assets
Amortizable
Weighted-average remaining amortization period for intangible assets	30 years 7 months 6 days
Finite-lived intangible assets, gross	$ 95,000	94,875
Accumulated amortization	(15,905)	(15,138)
Total	$ 79,095	79,737
Use Rights
Amortizable
Weighted-average remaining amortization period for intangible assets	16 years 2 months 12 days
Finite-lived intangible assets, gross	$ 99,869	99,869
Accumulated amortization	(27,965)	(26,453)
Total	$ 71,904	73,416
Executory contracts and other agreements
Amortizable
Weighted-average remaining amortization period for intangible assets	23 years 8 months 12 days
Finite-lived intangible assets, gross	$ 21,996	21,570
Accumulated amortization	(5,806)	(5,037)
Total	16,190	16,533
Non-compete agreements
Amortizable
Finite-lived intangible assets, gross	0	1,100
Accumulated amortization	0	(1,082)
Total	$ 0	18
Debt issuance costs
Amortizable
Weighted-average remaining amortization period for intangible assets	2 years 8 months 12 days
Finite-lived intangible assets, gross	$ 26,001	25,592
Accumulated amortization	(11,335)	(9,921)
Total	$ 14,666	$ 15,671