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Fair Value Measurements (Fair Value Inputs, Liabilities, Quantitative Information) (Details) (USD $) In Thousands, unless otherwise specified |  | 6 Months Ended |  |
--- | --- | --- | --- | ---
Jun. 30, 2012 | Jun. 30, 2012 Income Approach Valuation Technique [Member] Contingent Consideration [Member] | Jun. 30, 2012 Income Approach Valuation Technique [Member] Minimum [Member] Contingent Consideration [Member] | Jun. 30, 2012 Income Approach Valuation Technique [Member] Maximum [Member] Contingent Consideration [Member] | Jun. 30, 2012 Estimate of Fair Value, Fair Value Disclosure [Member] Fair Value, Measurements, Recurring [Member] | Dec. 31, 2011 Estimate of Fair Value, Fair Value Disclosure [Member] Fair Value, Measurements, Recurring [Member]
Fair Value Inputs, Liabilities, Quantitative Information [Line Items] |  |  |  |  |  |
Liabilities - Contingent consideration liability | $ 6,738 |  |  |  | $ 6,738 | $ 1,290
Discount rate |  |  | 10.00% | 14.50% |  |
Probability of milestone payment |  | 90.00% |  |  |  |

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