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CONDENSED CONSOLIDATED STATEMENT OF COMPREHENSIVE EARNINGS (unaudited) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2020 | Sep. 30, 2019 | Sep. 30, 2020 | Sep. 30, 2019
Statement of Comprehensive Income [Abstract] |  |  |  |
Net earnings | $ 200,300 | $ 206,006 | $ 501,345 | $ 509,796
Foreign currency translation adjustments [Abstract] |  |  |  |
Foreign currency translation (losses) gains | 29,271 | (50,865) | (19,714) | (41,143)
Reclassification of foreign currency translation losses to earnings | 0 | 0 | 0 | 25,339
Total foreign currency translation adjustment | 29,271 | (50,865) | (19,714) | (15,804)
Pension and other postretirement benefit plans [Abstract] |  |  |  |
Amortization of actuarial losses included in net periodic pension cost | 1,881 | 127 | 5,385 | 379
Amortization of prior service cost included in net periodic pension cost | 250 | 539 | 794 | 1,623
Total pension and other postretirement benefit plans | 2,131 | 666 | 6,179 | 2,002
Changes in fair value of cash flow hedges [Abstract] |  |  |  |
Unrealized net gains (losses) arising during period | (278) | 545 | (3,472) | (223)
Net losses (gains) reclassified into earnings | (210) | 577 | 318 | (69)
Total cash flow hedges | (488) | 1,122 | (3,154) | (292)
Other comprehensive (loss) earnings | 30,914 | (49,077) | (16,689) | (14,094)
Comprehensive earnings | $ 231,214 | $ 156,929 | $ 484,656 | $ 495,702

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