Stock Based Compensation - Stock Options Activity (Details)	12 Months Ended
	Dec. 31, 2016 $ / shares shares
Number of Shares
Outstanding at beginning of period (in shares) | shares	199,747
Granted (in shares) | shares	23,362
Forfeited (in shares) | shares	(11,516)
Exercised (in shares) | shares	(37,836)
Outstanding at end of period (in shares) | shares	173,757
Weighted Average Exercise Price
Outstanding at beginning of period (in USD per share) | $ / shares	$ 23.02
Granted (in USD per share) | $ / shares	28.10
Forfeited (in USD per share) | $ / shares	25.94
Exercised (in USD per share) | $ / shares	22.38
Outstanding at end of period (in USD per share) | $ / shares	$ 23.65
Weighted average remaining contractual life, Outstanding at end of period	4 years 343 days