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Fair Value Measurements (Tables)
6 Months Ended
Sep. 30, 2021
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, 2021 and March 31, 2021.
September 30, 2021March 31, 2021
(In thousands)Carrying ValueFair ValueCarrying ValueFair Value
2021 Senior Notes$600,000 $577,500 $600,000 $570,000 
2019 Senior Notes400,000 416,000 400,000 417,000 
2012 Term B-5 Loans, Amendment No. 5— — 495,000 493,763 
2012 Term B-5 Loans, Amendment No. 6600,000 599,250 — — 
2012 ABL Revolver20,000 20,000 — — 
Interest rate swaps973 973 2,363 2,363