XML 296 R91.htm IDEA: XBRL DOCUMENT v3.24.1.1.u2
Accumulated Other Comprehensive Income (Details) - USD ($)
$ in Thousands
 12 Months Ended
Mar. 31, 2024
Mar. 31, 2023
Mar. 31, 2022
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]      
Beginning of period $ 992,002 $ 1,046,721 $ 1,071,176
Other comprehensive (loss) income before reclassifications (7,346) 21,665 25,326
Amounts reclassified from accumulated other comprehensive income (12,455) (917) 13,030
Total other comprehensive (loss) income, net of tax (19,801) 20,748 38,356
End of period 1,046,562 992,002 1,046,721
Total      
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]      
Beginning of period 29,333 8,585 (29,771)
Total other comprehensive (loss) income, net of tax (19,801) 20,748 38,356
End of period 9,532 29,333 8,585
Post-retirement plans      
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]      
Beginning of period 19,450 8,811 (1,562)
Other comprehensive (loss) income before reclassifications (15,989) 10,644 10,294
Amounts reclassified from accumulated other comprehensive income (1,485) (5) 79
Total other comprehensive (loss) income, net of tax (17,474) 10,639 10,373
End of period 1,976 19,450 8,811
Other comprehensive income benefit (expense) 5,500 3,800 3,600
Derivatives designated as cash flow hedges      
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]      
Beginning of period 9,883 (226) (28,209)
Other comprehensive (loss) income before reclassifications 8,643 11,021 15,032
Amounts reclassified from accumulated other comprehensive income (10,970) (912) 12,951
Total other comprehensive (loss) income, net of tax (2,327) 10,109 27,983
End of period 7,556 9,883 (226)
Other comprehensive income benefit (expense) $ (3,200) $ 3,900 $ 5,300