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Compensation Plans - Summary of Restricted Stock Units Activity (Details) - Restricted Stock Units (RSUs)
12 Months Ended
Dec. 31, 2016
$ / shares
shares
Shares  
Outstanding, beginning of period (in shares) | shares 86,354
Granted (in shares) | shares 32,913
Vested (in shares) | shares (56,089)
Forfeited (in shares) | shares (4,480)
Outstanding, end of period (in shares) | shares 58,698
Weighted Average Grant Date Fair Value  
Outstanding, beginning of period (usd per share) | $ / shares $ 14.31
Granted (usd per share) | $ / shares 29.71
Vested (usd per share) | $ / shares 14.25
Forfeited (usd per share) | $ / shares 13.51
Outstanding, end of period (usd per share) | $ / shares $ 23.06