v3.26.1
Intangible Assets (Details) - USD ($)
$ in Thousands
 12 Months Ended
Mar. 31, 2026
Mar. 31, 2024
Mar. 31, 2025
Amortization related to intangible assets      
Finite-lived intangible assets, gross $ 1,195,102   $ 1,191,681
Accumulated amortization (389,992)   (340,334)
Total $ 805,110   851,347
Trade names | Water Solutions      
Amortization related to intangible assets      
Intangible asset impairment, indefinite-lived   $ 300  
Impairment, Intangible Asset, Indefinite-Lived (Excluding Goodwill), Statement of Income or Comprehensive Income [Extensible Enumeration]   Gain/loss on disposal or impairment of assets, net  
Customer relationships      
Amortization related to intangible assets      
Weighted-average remaining amortization period for intangible assets 17 years 2 months 12 days    
Finite-lived intangible assets, gross $ 857,903   857,903
Accumulated amortization (304,877)   (264,675)
Total $ 553,026   593,228
Customer contracts      
Amortization related to intangible assets      
Weighted-average remaining amortization period for intangible assets 18 years 3 months 18 days    
Finite-lived intangible assets, gross $ 192,000   192,000
Accumulated amortization (51,840)   (44,160)
Total $ 140,160   147,840
Right-of-way and easements      
Amortization related to intangible assets      
Weighted-average remaining amortization period for intangible assets 25 years 6 months    
Finite-lived intangible assets, gross $ 111,980   99,964
Accumulated amortization (28,367)   (21,645)
Total $ 83,613   78,319
Executory contracts and other agreements      
Amortization related to intangible assets      
Weighted-average remaining amortization period for intangible assets 23 years    
Finite-lived intangible assets, gross $ 19,324   19,973
Accumulated amortization (4,654)   (5,106)
Total $ 14,670   14,867
Debt issuance costs      
Amortization related to intangible assets      
Weighted-average remaining amortization period for intangible assets 2 years 10 months 24 days    
Finite-lived intangible assets, gross $ 13,895   21,841
Accumulated amortization (254)   (4,748)
Total 13,641   $ 17,093
Debt issuance costs | ABL Facility      
Amortization related to intangible assets      
Write off of debt issuance costs and other expenses $ 1,700