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Stock-Based Compensation Stock Activity (Details) - USD ($)
12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]    
Number of shares - outstanding, December 31, 2014 4,671,639  
Granted, in shares 110,825  
Exercised, in shares 396,010  
Forfeited, in shares 14,700  
Expired, in shares 5,457  
Number of shares - outstanding, December 31, 2015 4,366,297 4,671,639
Number of shares - exercisable, December 31, 2015 2,225,613  
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Abstract]    
Weighted average exercise price per share - outstanding, December 31, 2014 $ 5.88  
Weighted average exercise price per share - granted 20.00  
Weighted average exercise price per share - exercised 5.68  
Weighted average exercise price per share - forfeited 13.47  
Weighted average exercise price per share - expired 6.12  
Weighted average exercise price per share - outstanding, December 31, 2015 6.24 $ 5.88
Weighted average exercise price per share - exercisable, December 31, 2015 $ 5.72  
Share-based Compensation Arrangement by Share-based Payment Award, Options, Additional Disclosures [Abstract]    
Options, outstanding, weighted average remaining contractual term 7 years 1 month 2 days
Options, exercisable, weighted average remaining contractual term 6 years 11 months 27 days  
Aggregate Intrinsic Value, outstanding in dollars per share $ 54,700  
Aggregate Intrinsic Value, exercisable, in dollars per share $ 29,000