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CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY (Parenthetical) (USD $) In Thousands, unless otherwise specified | 12 Months Ended
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Dec. 31, 2011 | Dec. 31, 2010 | Dec. 31, 2009
CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY [Abstract] |  |  |
Unrealized holding gains (losses) on marketable securities, tax effect | $ (310) | $ 280 | $ 2,648
Reclassification adjustment of unrealized holding gains included in net earnings (loss), tax effect | (45) | 0 | (2,629)
Change in unfunded SERP liability, taxes | $ (306) | $ (294) | $ 264

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