Fair value of financial instrument classified as a liability measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing.

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=25499696&loc=d3e19207-110258

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

Fair Value Measurements - Fair Value Inputs, Liabilities, Quantitative Information (Details) (Contingent Consideration, USD $) In Thousands, unless otherwise specified					3 Months Ended				3 Months Ended		3 Months Ended
	Mar. 31, 2014	Dec. 31, 2013	Mar. 31, 2013	Dec. 31, 2012	Mar. 31, 2014 Income Approach Valuation Technique Fair Value, Inputs, Level 3	Mar. 31, 2014 Minimum Income Approach Valuation Technique Fair Value, Inputs, Level 3	Mar. 31, 2014 Maximum Income Approach Valuation Technique Fair Value, Inputs, Level 3	Mar. 31, 2014 Revenue-based Payments	Mar. 31, 2014 Revenue-based Payments Income Approach Valuation Technique Fair Value, Inputs, Level 3	Mar. 31, 2014 Other Payments	Mar. 31, 2014 Other Payments Income Approach Valuation Technique Fair Value, Inputs, Level 3
Fair Value Inputs, Liabilities, Quantitative Information [Line Items]
Discount rate					5.40%	11.00%	15.00%
Contingent consideration liability	$ 2,513	$ 2,526	$ 6,694	$ 6,697				$ 2,265		$ 248
Probability of milestone payment									90.00%		100.00%