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CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (Unaudited) - USD ($) $ in Thousands | 3 Months Ended
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Mar. 31, 2018 | Mar. 31, 2017
CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (Unaudited) [Abstract] |  |
Net earnings | $ 7,989 | $ 15,734
Other comprehensive income (loss), net of tax: |  |
Foreign currency translation adjustments | 2,219 | 2,723
Amortization of: |  |
Unrecognized gain | (9) | (59)
Income tax expense related to pension and postretirement plans | 4 | 24
Pension and postretirement plans, net of tax | (5) | (35)
Total other comprehensive income, net of tax | 2,214 | 2,688
Comprehensive income | $ 10,203 | $ 18,422

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