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CONSOLIDATED STATEMENT OF COMPREHENSIVE INCOME (LOSS) (Parenthetical) - USD ($)
$ in Thousands
9 Months Ended 12 Months Ended
Dec. 31, 2015
Mar. 31, 2015
Mar. 31, 2014
Pension and other postretirement benefits:      
Reclassification of prior service credits for pension and postretirement benefit plans recorded to net income, tax effect $ 8,073 $ 11,740 $ 11,240
Reclassification of net actuarial loss pension and postretirement benefit plans recorded to net income, tax effect (43,887) (8,186) (56,791)
Valuation adjustment for pension and postretirement benefit plans, tax effect (2,924) 139,583 (48,772)
Change in fair value of derivatives, tax effect 624 (1,866) 1,771
Change in fair value of available-for-sale securities, tax effect (231) (151) (29)
Change in cumulative translation adjustment, tax effect $ 0 $ 0 $ 942