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Stock-Based Compensation - Schedule of Restricted Stock Unit Activity and Weighted Average Grant Date Fair Value (Details) - Restricted Stock Units
9 Months Ended
Sep. 30, 2016
$ / shares
shares
Shares  
Non-vested at January 1, 2016 (in shares) | shares 15,916
Granted (in shares) | shares 160,228
Forfeited (in shares) | shares (8,212)
Vested (in shares) | shares (13,247)
Unearned performance-based awards (in shares) | shares (677)
Non-vested at September 30, 2016 (in shares) | shares 154,008
Weighted-Average Grant Date Fair Value  
Non-vested at January 1, 2016 (in dollars per share) | $ / shares $ 43.47
Granted (in dollars per share) | $ / shares 33.20
Forfeited (in dollars per share) | $ / shares 33.05
Vested (in dollars per share) | $ / shares 42.79
Unearned performance-based awards (in dollars per share) | $ / shares 53.74
Non-vested at September 30, 2016 (in dollars per share) | $ / shares $ 33.40