v3.26.1
Contingencies and Guaranty - Narrative (Details)
$ in Thousands
1 Months Ended 12 Months Ended
Jun. 30, 2025
USD ($)
Oct. 31, 2022
state
Mar. 31, 2026
USD ($)
Mar. 31, 2025
USD ($)
Mar. 31, 2024
USD ($)
Other Commitments [Line Items]          
Prepayments received     $ 161,178 $ 124,672 $ 122,212
Employer contribution amount     400 $ 500  
Collaborative Arrangement, Transaction with Party to Collaborative Arrangement | Wireless Licenses          
Other Commitments [Line Items]          
Consideration transferred $ 28,000        
Collaborative Arrangement, Transaction with Party to Collaborative Arrangement | Maximum | Wireless Licenses          
Other Commitments [Line Items]          
Prepayments received     18,200    
Xcel Energy | Collaborative Arrangement, Transaction with Party to Collaborative Arrangement          
Other Commitments [Line Items]          
Agreement term   20 years      
Number of states in service territory | state   8      
Prepayments received     76,000    
Xcel Energy | Collaborative Arrangement, Transaction with Party to Collaborative Arrangement | Maximum          
Other Commitments [Line Items]          
Prepayments received     $ 67,400