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Stock-Based Compensation - Schedule of Restricted Stock Unit Activity and Weighted Average Grant Date Fair Value (Details) - Restricted Stock Units
3 Months Ended
Mar. 31, 2017
$ / shares
shares
Shares  
Non-vested at January 1, 2017 (in shares) | shares 150,682
Granted (in shares) | shares 129,146
Forfeited (in shares) | shares (3,075)
Vested (in shares) | shares (483)
Unearned performance-based awards (in shares) | shares (604)
Non-vested at March 31, 2017 (in shares) | shares 275,666
Weighted-Average Grant Date Fair Value  
Non-vested at January 1, 2017 (in dollars per share) | $ / shares $ 33.39
Granted (in dollars per share) | $ / shares 35.54
Forfeited (in dollars per share) | $ / shares 33.17
Vested (in dollars per share) | $ / shares 41.70
Unearned performance-based awards (in dollars per share) | $ / shares 52.83
Non-vested at March 31, 2017 (in dollars per share) | $ / shares $ 34.34