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Stock-based Compensation - Assumptions (Details)
6 Months Ended
Jun. 30, 2016
$ / shares
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions and Methodology  
Risk-free interest rate 1.60%
Vesting period 3 years
Average life of options (years) 6 years 6 months
Volatility 35.00%
Dividend yield 0.00%
Fair value per stock option (per share) $ 10.43