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Condensed Consolidated Statements of Stockholders' Equity (Parenthetical) (USD $) In Thousands, except Per Share data, unless otherwise specified | 3 Months Ended
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Mar. 31, 2012 | Mar. 31, 2011
Condensed Consolidated Statements of Stockholders' Equity |  |
Translation adjustment, tax (in dollars) | $ 23 | $ (1)
Cash dividends declared on common stock, per share | $ 0.125 | $ 0.125
Common stock issued, per share | $ 33.71 | $ 30.91

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