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CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (USD $) In Thousands, unless otherwise specified | 12 Months Ended
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Dec. 31, 2013 | Dec. 31, 2012 | Dec. 31, 2011
CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME [Abstract] |  |  |
Net earnings | $ 51,450 | $ 41,353 | $ 62,401
Other comprehensive income (loss), net of tax: |  |  |
Foreign currency translation adjustments | (1,101) | 1,585 | (1,512)
Amortization of: |  |  |
Prior service benefit | (4,317) | (4,784) | (6,402)
Unrecognized loss | 3,123 | 3,096 | 2,376
Plan amendment adjustment | 0 | 0 | 14,415
Curtailment | 0 | 0 | (3,647)
Unrecognized amounts | (343) | 33 | 20
Foreign currency exchange rate changes | (32) | 14 | (7)
Income tax benefit (expense) related to pension and postretirement plans | 577 | 636 | (2,660)
Pension and post retirement plans, net of tax | (992) | (1,005) | 4,095
Total other comprehensive income, net of tax | (2,093) | 580 | 2,583
Comprehensive income | $ 49,357 | $ 41,933 | $ 64,984

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