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Share-Based Compensation - Summarized Information About Stock Awards (Details)
$ / shares in Units, $ in Thousands
3 Months Ended
Mar. 31, 2017
USD ($)
$ / shares
shares
Outstanding:  
Aggregate intrinsic value $ 46,007
Weighted average remaining contractual life (years) 6 years 8 months
Exercisable:  
Number of shares (in shares) | shares 1,437,000
Weighted average exercise price (in dollars per share) | $ / shares $ 20.50
Aggregate intrinsic value $ 32,464
Weighted average remaining contractual life (years) 4 years 9 months