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Consolidated Statements of Comprehensive Earnings (unaudited) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Sep. 30, 2015 | Sep. 30, 2014 | Sep. 30, 2015 | Sep. 30, 2014
Statement Of Income And Comprehensive Income [Abstract] |  |  |  |
Net Earnings | $ 29,819 | $ 50,319 | $ 67,581 | $ 88,029
Change in Funded Status of Defined Benefit Plans: |  |  |  |
Amortization of Net Actuarial Loss | 508 | 163 | 1,016 | 326
Tax Expense | (188) | (57) | (376) | (114)
Comprehensive Earnings | $ 30,139 | $ 50,425 | $ 68,221 | $ 88,241

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