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Fair Value Measurements (Tables)
12 Months Ended
Dec. 31, 2013
Fair Value Measurements [Abstract]  
Intangible Assets Calculated Using Discounted Cash Flow Analyses Which Rely Upon Significant Unobservable Level 3 Inputs
Unobservable input Range
Discount rate (WACC) 15.0%
Risk premium 1.0% -2.0%
Royalty rate 2.0%
Future attributable revenues 77.0% - 97.0%