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Income Taxes (Details 9) (USD $) In Thousands, unless otherwise specified | 12 Months Ended
--- | ---
Dec. 31, 2012 | Dec. 31, 2011 | Dec. 31, 2010
Balance at beginning of year | $ 128 | $ 6,892 | $ 8,450
Increase related to prior year tax positions | 658 | 0 | 0
Decrease related to prior year tax positions | 0 | (6,759) | (2,295)
Increase related to current year tax positions | 0 | 0 | 133
Effect of exchange rate change | 5 | (5) | 604
Balance at end of year | $ 791 | $ 128 | $ 6,892

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