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Consolidated Statements of Comprehensive Earnings (Loss) (unaudited) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2019 | Dec. 31, 2018
Statement Of Income And Comprehensive Income [Abstract] |  |  |  |
Net Earnings (Loss) | $ (114,632) | $ 57,715 | $ (1,535) | $ 196,657
Net Actuarial Change in Defined Benefit Plans: |  |  |  |
Amortization of net actuarial loss | 43 | 73 | 131 | 219
Tax expense | (10) | (17) | (30) | (51)
Comprehensive Earnings (Loss) | $ (114,599) | $ 57,771 | $ (1,434) | $ 196,825

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