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Accumulated Other Comprehensive Income (Table Text Block) | 12 Months Ended
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Mar. 31, 2021
Table Text Block [Abstract] |
Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block] | Foreign Currency Translation Unrealized Net Gain on Investments Fair Value of Cash Flow Hedges Postretirement Benefit Obligation Net Loss Accumulated Other Comprehensive Income (Loss) (In thousands) Balance as of March 31, 2020 $ (47,235) $ 90,684 $ (6,196) $ (2,601) $ 34,652 Foreign currency translation (5,694) - - - (5,694) Unrealized net gain on investments - 76,969 - - 76,969 Change in fair value of cash flow hedges - - (429) - (429) Amounts reclassified into earnings on hedging activities - - 2,746 - 2,746 Change in post retirement benefit obligaitons - - - (1,387) (1,387) Other comprehensive income (loss) (5,694) 76,969 2,317 (1,387) 72,205 Balance as of March 31, 2021 $ (52,929) $ 167,653 $ (3,879) $ (3,988) $ 106,857

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