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Fair Value Measurements (Tables)
6 Months Ended
Sep. 30, 2023
Fair Value Disclosures [Abstract]  
Summary of Carry Amounts and Fair Value Measurements The summary below details the carrying amounts and estimated fair values of these instruments at September 30, 2023 and March 31, 2023.
September 30, 2023March 31, 2023
(In thousands)Carrying ValueFair ValueCarrying ValueFair Value
2019 Senior Notes400,000 373,000 400,000 383,500 
2021 Senior Notes600,000 482,250 600,000 510,750 
2012 Term B-5 Loans275,000 275,000 360,000 359,550