Stock-Based Compensation Plans (Tables)

6 Months Ended

Jun. 30, 2013

Stock-Based Compensation Plans

Schedule of stock option valuation assumptions

	Three and Six Months Ended June 30
	2013	2012
Expected stock price volatility	36%	38%
Range of risk free interest rates	0.09% - 2.03%	0.03% - 2.01%
Expected life of options (years)	5.4	5.2