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Share-Based Compensation - Summary of Nonvested Restricted Stock Unit Activity (Details)
9 Months Ended
Sep. 30, 2017
$ / shares
shares
Restricted Stock Units Activity [Abstract]  
Number of Shares, Nonvested beginning balance | shares 1,136
Number of Shares, Granted | shares 274
Number of Shares, Vested | shares (317)
Number of Shares, Forfeited | shares (47)
Number of Shares, Nonvested ending balance | shares 1,046
Weighted Average Grant Date Fair Value, Nonvested beginning balance | $ / shares $ 12.30
Weighted Average Grant Date Fair Value, Granted | $ / shares 22.62
Weighted Average Grant Date Fair Value, Vested | $ / shares 11.90
Weighted Average Grant Date Fair Value, Forfeited | $ / shares 12.92
Weighted Average Grant Date Fair Value, Nonvested ending balance | $ / shares $ 15.10