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CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (Unaudited) (USD $) In Thousands, unless otherwise specified | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2013 | Sep. 30, 2012 | Sep. 30, 2013 | Sep. 30, 2012
CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (Unaudited) [Abstract] |  |  |  |  |  |
Net earnings | $ 17,297 |  | $ 16,840 | $ 42,514 |  | $ 35,438
Other comprehensive income (loss), net of tax: |  |  |  |  |  |
Foreign currency translation adjustments | 1,033 |  | 1,449 | (719) |  | 1,615
Amortization of: |  |  |  |  |  |
Prior service benefit | (1,078) | [1] | (1,197) | (3,238) | [1] | (3,589)
Unrecognized loss | 781 | [1] | 773 | 2,342 | [1] | 2,321
Unrecognized amounts | 0 |  | 0 | 154 |  | 437
Foreign currency exchange rate changes | 8 |  | 26 | (19) |  | 24
Income tax benefit (expense) related to pension and postretirement plans | 110 |  | 161 | 269 |  | 310
Pension and post retirement plans, net of tax | (179) |  | (237) | (492) |  | (497)
Total other comprehensive income (loss), net of tax | 854 |  | 1,212 | (1,211) |  | 1,118
Comprehensive income | $ 18,151 |  | $ 18,052 | $ 41,303 |  | $ 36,556
[1] | These accumulated other comprehensive income components are included in the computation of net periodic pension and postretirement benefit costs, which are included in selling, general and administrative expenses in our consolidated statements of operations (see Note 11 for additional details).

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