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Fair Value Measurements - Fair Value Inputs, Liabilities, Quantitative Information (Details) (Contingent Consideration [Member], USD $) In Thousands, unless otherwise specified |  |  |  | 12 Months Ended |  |  |
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Dec. 31, 2012 | Dec. 31, 2011 | Dec. 31, 2010 | Dec. 31, 2012 Income Approach Valuation Technique [Member] Fair Value, Inputs, Level 3 [Member] | Dec. 31, 2011 Income Approach Valuation Technique [Member] Fair Value, Inputs, Level 3 [Member] | Dec. 31, 2012 Minimum [Member] Income Approach Valuation Technique [Member] Fair Value, Inputs, Level 3 [Member] | Dec. 31, 2011 Minimum [Member] Income Approach Valuation Technique [Member] Fair Value, Inputs, Level 3 [Member] | Dec. 31, 2012 Maximum [Member] Income Approach Valuation Technique [Member] Fair Value, Inputs, Level 3 [Member] | Dec. 31, 2011 Maximum [Member] Income Approach Valuation Technique [Member] Fair Value, Inputs, Level 3 [Member] | Dec. 31, 2012 Revenue-based Payments [Member] | Dec. 31, 2011 Revenue-based Payments [Member] | Dec. 31, 2012 Other Payments [Member]
Fair Value Inputs, Liabilities, Quantitative Information [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Discount rate |  |  |  | 4.50% |  | 10.00% | 10.00% | 14.50% | 14.50% |  |  |
Contingent consideration liability | $ 6,697 | $ 1,290 | $ 0 |  |  |  |  |  |  | $ 6,370 | $ 1,290 | $ 327
Probability of milestone payment |  |  |  | 90.00% | 90.00% |  |  |  |  |  |  |

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- Definition Fair Value Inputs, Probability of Milestone Payment + References No definition available. + Details
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- Definition Interest rate used to find the present value of an amount to be paid or received in the future as an input to measure fair value. For example, but not limited to, weighted average cost of capital (WACC), cost of capital, cost of equity and cost of debt. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (bbb) -URI http://asc.fasb.org/extlink&oid=7578670&loc=d3e19207-110258 + Details
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- Details
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- Definition This element represents a liability measured at fair value using significant unobservable inputs (Level 3) which is required for reconciliation purposes of beginning and ending balances. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=7578670&loc=d3e19207-110258 + Details
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