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CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (Parenthetical) (USD $)
In Thousands, unless otherwise specified
12 Months Ended
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2010
CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME      
Operating income (loss), tax expense (benefit) $ 212 $ (2,709) $ (4,833)
Gain (loss) on disposition of discontinued operations, income tax expense     $ (166)