Stock Based Compensation (Tables)

12 Months Ended

Dec. 31, 2016

Disclosure of Compensation Related Costs, Share-based Payments [Abstract]

Assumptions Used To Determine Fair Value of Stock Options

The following assumptions were used to determine the fair value of stock options as of the grant date to determine compensation expense for the years ended December 31, 2016, 2015, and 2014:

Stock Options:	2016			2015			2014
Grant date fair value		$6.31			$7.01			$6.73
Expected life of options	8 years			8 years			8 years
Risk-free interest rate	2.15		%	2.17		%	2.21		%
Dividend yield rate	2.85		%	2.64		%	2.64		%
Price volatility	27.37		%	28.63		%	28.93		%

Stock Options Activity

The following table summarizes stock option activity during 2016: 

	Number of Shares		Weighted Average Exercise Price		Weighted Average Remaining Contractual Life, in Years
Outstanding at January 1, 2016	199,747			$23.02
Granted	23,362		28.10
Forfeited	(11,516	)	25.94
Exercised	(37,836	)	22.38
Outstanding at December 31, 2016	173,757			$23.65	4.94

Restricted Stock Unit Activity

The following table summarizes restricted stock unit activity during 2016:

	Number of Shares		Weighted Average Grant Date Fair Value		Weighted Average Remaining Contractual Life, in Years
Outstanding at January 1, 2016	62,987			$26.69
Granted	26,058		28.10
Vested	(19,432	)	23.74
Forfeited	(4,712	)	28.09
Outstanding at December 31, 2016	64,901			$28.04	1.94