Stock Based Compensation Plan (Details) - $ / shares	6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Award vesting period (in years)	4 years
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]
Outstanding, Beginning of Period, in shares	355,651
Granted, in shares	54,000
Exercised, in shares	(33,062)	(59,711)
Forfeited, in shares	0
Outstanding, End of Period, in shares	376,589
Exercisable at Period End, in shares	237,443
Vested and Expected to Vest, in shares	139,146
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Roll Forward]
Outstanding at Beginning of Period, in dollars per share	$ 22.52
Granted, in dollars per share	37.20
Exercised, in dollars per share	21.22
Forfeited, in dollars per share	0.00
Outstanding, End of Period, in dollars per share	24.74
Exercisable at Period End, in dollars per share	21.96
Vested and Expected to Vest, in dollars per share	29.49
Fair Value, in dollars per share	$ 6.44
Dividend Yield	2.72%
Expected Volatility	21.40%
Risk Free Interest Rate	2.25%
Expected Lives, in years	6 years 10 months 18 days