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Statement of Comprehensive Income - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
Net earnings | $ 375,972 | $ 384,370 | $ 352,820
Other comprehensive income (loss), net of tax: |  |  |
Foreign currency translation adjustment | 83,982 | (57,928) | (52,434)
Unrealized gains (losses) on cash flow hedging arrangements: |  |  |
Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, Net of Tax | 1,424 | (513) | 13,221
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI on Derivatives, Net of Tax | (273) | (4,735) | (8,261)
Net actuarial gains (losses) | (10,378) | (47,788) | (30,759)
Plan amendments and prior service cost | 12,056 | 0 | 9,189
Amortization of actuarial (gains) losses and plan amendments and prior service cost | 14,873 | 16,730 | 9,509
Defined Benefit Plans, Impact of FX on Current Year Change in OCI, net of tax | (12,092) | 5,885 | 5,835
Total other comprehensive income (loss), net of tax | 89,592 | (88,349) | (53,700)
Total other comprehensive income (loss), net of tax | $ 465,564 | $ 296,021 | $ 299,120

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