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Consolidated Statements Of Cash Flows (Parenthetical) (USD $) In Thousands, unless otherwise specified | 12 Months Ended
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Dec. 31, 2011 | Dec. 31, 2010 | Dec. 31, 2009
Consolidated Statements Of Cash Flows [Abstract] |  |  |
Tax payments | $ 2,292 | $ 413 | $ 636
Dividends received |  | $ 600 |

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