Stock-Based Compensation Plans (Tables)

6 Months Ended

Jun. 30, 2014

Stock-Based Compensation Plans

Schedule of weighted average assumptions used to calculate the fair value of options granted

	Three and Six Months Ended June 30
	2014	2013
Expected stock price volatility	31%	36%
Range of risk free interest rates	0.02% - 2.67%	0.09% - 2.03%
Expected life of options (years)	5.2	5.4