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Consolidated Statements of Equity [Parenthetical] (USD $)
In Thousands, except Per Share data, unless otherwise specified
12 Months Ended
Dec. 31, 2011
Dec. 31, 2010
Dec. 31, 2009
Tax effect on unrecognized actuarial loss $ (125) $ (54) $ (18)
Declaration of dividend per share (in dollars per share) $ 0.060 $ 0.125 $ 0.150