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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, 2013 | Dec. 31, 2012 | Dec. 31, 2011
CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY [Abstract] |  |  |
Unrealized holding gains (losses) on marketable securities, tax effect | $ 45 | $ (154) | $ (310)
Reclassification adjustment of unrealized holding gains included in net earnings, tax effect | (37) | 0 | (45)
Reclassification adjustment of unrealized holding losses included in net earnings, tax effect | 0 | 348 | 0
Change in unfunded SERP liability, taxes | $ 457 | $ (210) | $ (306)

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