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Other Comprehensive Income (Loss) (Details) (USD $) In Thousands, unless otherwise specified | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2012 | Sep. 30, 2011 | Sep. 30, 2012 | Sep. 30, 2011
Comprehensive income (loss) component, foreign currency translation |  |  |  |
Before-tax amount | $ 20 | $ (115) | $ 13 | $ (53)
Tax expense (benefit) | 6 | (33) | 3 | (17)
Net-of-tax amount | $ 14 | $ (82) | $ 10 | $ (36)

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