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CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY (Parenthetical) (USD $) In Thousands, except Per Share data, unless otherwise specified | 12 Months Ended
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Dec. 31, 2012 | Dec. 31, 2011 | Dec. 31, 2010
CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY [Abstract] |  |  |
Other comprehensive income, tax | $ (287) | $ 184 | $ 741
Dividends on common stock (in dollars per share) | $ 2.00 | $ 0 | $ 0

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