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Significant Unobservable Inputs Used in Fair Value Measurements (Details) - Contingent Consideration Liabilities - Fair Value, Inputs, Level 3
Dec. 31, 2015
Dec. 31, 2014
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation    
Weighted Average, Probability of achieving payout targets 76.20% 79.10%
Weighted Average, Discount rate 7.50% 7.50%