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CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2016 | Dec. 31, 2015 | Dec. 31, 2014
CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME [Abstract] |  |  |
Net earnings | $ 60,430 | $ 46,018 | $ 43,029
Other comprehensive income (loss), net of tax: |  |  |
Foreign currency translation adjustments | (5,294) | (5,739) | (3,781)
Amortization of: |  |  |
Prior service benefit | (54) | (112) | (3,017)
Unrecognized loss | 763 | 2,261 | 2,435
Unrecognized actuarial gains (losses) | 542 | 462 | (413)
Plan settlement | 0 | 654 | 0
Foreign currency exchange rate changes | 3 | (23) | (34)
Income tax (expense) benefit related to pension and postretirement plans | (514) | (1,325) | 372
Pension and post retirement plans, net of tax | 740 | 1,917 | (657)
Total other comprehensive income (loss), net of tax | (4,554) | (3,822) | (4,438)
Comprehensive income | $ 55,876 | $ 42,196 | $ 38,591

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