v3.26.1
Fair Value Measurement and Derivative Transactions (Tables)
 12 Months Ended
Mar. 31, 2026
Fair Value Disclosures [Abstract]  
Schedule of Derivative Assets at Fair Value A summary of the fair values for the various derivatives, which are all measured using Level 2 inputs, at March 31, 2026 and 2025 is presented below:
 Diesel fuel option collars and swaps
 Assets Liabilities
(Amounts in thousands)Receivables Other assets 
Other accrued liabilities
 
Other liabilities
March 31, 2026$4,973 $229 $(61)$(59)
March 31, 2025223 2 (248)(25)
Schedule of Derivative Liabilities at Fair Value A summary of the fair values for the various derivatives, which are all measured using Level 2 inputs, at March 31, 2026 and 2025 is presented below:
 Diesel fuel option collars and swaps
 Assets Liabilities
(Amounts in thousands)Receivables Other assets 
Other accrued liabilities
 
Other liabilities
March 31, 2026$4,973 $229 $(61)$(59)
March 31, 2025223 2 (248)(25)
Summary of Carrying And Fair Value of Senior Notes The following table presents the carrying and fair value of the Company’s 2027 Notes, 2030 Notes, 2034 Notes and Equipment Financing (as further discussed in “Note 13. Debt”) for the periods presented:
 March 31, 2026 March 31, 2025
(Amounts in thousands)Fair Value Carrying Value Fair Value Carrying Value
Senior Notes due 2027$— $— $344,036 $350,000 
Senior Notes due 2030505,940 500,000 500,845 500,000 
Senior Notes due 2034489,230 500,000 — — 
Equipment Financing2,961 3,056 6,714 5,988 
Total$998,131 $1,003,056 $851,595 $855,988