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Statements of Condensed Consolidated Operations (Parenthetical) (USD $)
In Thousands, unless otherwise specified
3 Months Ended 9 Months Ended
Sep. 30, 2012
Sep. 30, 2011
Sep. 30, 2012
Sep. 30, 2011
Income Statement [Abstract]        
Earnings (losses) from unconsolidated companies, tax provision $ 761 $ 985 $ 1,748 $ 1,422
Net earnings (losses) from discontinued operations, tax provision $ (426) $ (6,206) $ (21) $ (6,206)