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Condensed Consolidated Statements of Comprehensive Income (Unaudited) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Jan. 31, 2020 | Jan. 31, 2019 | Jan. 31, 2020 | Jan. 31, 2019
Statement of Comprehensive Income [Abstract] |  |  |  |
Net income | $ 12,804 | $ 18,409 | $ 61,848 | $ 61,664
Other comprehensive income, net of tax: |  |  |  |
Change in pension benefits, net of deferred taxes of $107 and $105, and $322 and $315 for the three and nine months ended January 31, 2020 and 2019, respectively | 315 | 307 | 946 | 921
Total Comprehensive Income | $ 13,119 | $ 18,716 | $ 62,794 | $ 62,585

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