Stock-Based Compensation (Tables)

3 Months Ended

Mar. 31, 2014

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

Weighted Average Assumptions Used in Calculating the Fair Value of Stock Option

he fair value of the stock option grants issued in the three months ended March 31, 2014 was calculated with the following weighted average assumptions:

Weighted average exercise price	$187.06
Risk free interest rate	2.1	%
Expected life of option in years	6.5
Expected dividend yield	3.0	%
Expected volatility	30.1	%