Stock Based Compensation (Tables)

6 Months Ended

Jun. 30, 2016

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

Restricted stock compensation footnote

During the six months ended June 30, 2016, the Company made the following awards of restricted stock:

Date	Shares Granted	Plan	Grant Date Fair Value Per Share		Vesting Period
2/11/2016	51,475	2005 Employee Stock Plan	$	41.96	Ratably over 5 years from grant date
3/1/2016	600	2005 Employee Stock Plan	$	44.37	Ratably over 5 years from grant date
5/24/2016	8,700	2010 NonEmployee Director Stock Plan	$	48.34	Once at end of 5 years from grant date

Schedule of Share-based Compensation, Stock Options, Activity [Table Text Block]

	Six Months Ended
	June 30, 2016
Date of grant	2/20/2016
Plan	2010
Options granted	5,000
Vesting period (beginning on grant date)	22 months
Expiration date	2/20/2026
Expected volatility	32.44		%
Expected life (years)	5.5
Expected dividend yield	2.28		%
Risk free interest rate	1.29		%
Fair value per option	$	10.59