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Fair Value Measurements (Fair Value Inputs, Liabilities, Quantitative Information) (Details) (Contingent Consideration [Member], USD $) In Thousands, unless otherwise specified |  |  |  | 3 Months Ended |  | 3 Months Ended
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Mar. 31, 2013 | Dec. 31, 2012 | Mar. 31, 2013 Revenue-based Payments [Member] | Mar. 31, 2013 Revenue-based Payments [Member] Fair Value, Inputs, Level 3 [Member] Income Approach Valuation Technique [Member] | Mar. 31, 2013 Revenue-based Payments [Member] Fair Value, Inputs, Level 3 [Member] Income Approach Valuation Technique [Member] Minimum [Member] | Mar. 31, 2013 Revenue-based Payments [Member] Fair Value, Inputs, Level 3 [Member] Income Approach Valuation Technique [Member] Maximum [Member] | Mar. 31, 2013 Other Payments [Member] | Mar. 31, 2013 Other Payments [Member] Fair Value, Inputs, Level 3 [Member] Income Approach Valuation Technique [Member]
Fair Value Inputs, Liabilities, Quantitative Information [Line Items] |  |  |  |  |  |  |  |
Liabilities - Contingent consideration liability | $ 6,694 | $ 6,697 | $ 6,362 |  |  |  | $ 332 |
Discount rate |  |  |  |  | 10.00% | 14.50% |  | 4.50%
Probability of milestone payment |  |  |  | 90.00% |  |  |  | 100.00%

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- Definition Fair Value Inputs, Probability of Milestone Payment + References No definition available. + Details
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Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

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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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Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

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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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Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant