v3.25.4
Intangible Assets (Details) - USD ($)
$ in Thousands
Dec. 31, 2025
Mar. 31, 2025
Amortization related to intangible assets    
Finite-lived intangible assets, gross $ 1,203,148 $ 1,191,681
Accumulated Amortization (383,152) (340,334)
Total $ 819,996 851,347
Customer relationships    
Amortization related to intangible assets    
Weighted-average remaining amortization period for intangible assets 17 years 4 months 24 days  
Finite-lived intangible assets, gross $ 857,903 857,903
Accumulated Amortization (294,826) (264,675)
Total $ 563,077 593,228
Customer contracts    
Amortization related to intangible assets    
Weighted-average remaining amortization period for intangible assets 18 years 6 months  
Finite-lived intangible assets, gross $ 192,000 192,000
Accumulated Amortization (49,920) (44,160)
Total $ 142,080 147,840
Right-of-way and easements    
Amortization related to intangible assets    
Weighted-average remaining amortization period for intangible assets 25 years 2 months 12 days  
Finite-lived intangible assets, gross $ 111,010 99,964
Accumulated Amortization (25,775) (21,645)
Total $ 85,235 78,319
Debt issuance costs    
Amortization related to intangible assets    
Weighted-average remaining amortization period for intangible assets 3 years 2 months 12 days  
Finite-lived intangible assets, gross $ 22,329 21,841
Accumulated Amortization (8,176) (4,748)
Total $ 14,153 17,093
Executory contracts and other agreements    
Amortization related to intangible assets    
Weighted-average remaining amortization period for intangible assets 23 years 1 month 6 days  
Finite-lived intangible assets, gross $ 19,906 19,973
Accumulated Amortization (4,455) (5,106)
Total $ 15,451 $ 14,867