Stock-Based Compensation	9 Months Ended
Stock-Based Compensation	Sep. 30, 2014
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Stock-Based Compensation	Stock-Based Compensation The 2011 Omnibus Incentive Compensation Plan (the "2011 Plan") provides for the granting of stock options, stock appreciation rights, restricted stock awards and performance awards to employees and non-employee directors. The terms and conditions of awards to be granted are determined by our Board's nominating and compensation committees. Vesting requirements vary by award. At September 30, 2014, there were 4,134,749 shares remaining in the 2011 Plan for future grants. During the nine months ended September 30, 2014, we granted 612,621 stock options at a weighted average exercise price of $47.21 per share based on the grant-date fair value of our stock to key employees under the 2011 Plan. The weighted average grant date fair value of options granted was $10.34 per share as determined by the Black-Scholes option valuation model using the following weighted average assumptions: a risk-free interest rate of 1.58%; expected life of 6 years based on prior experience; stock volatility of 22.0% based on historical data; and a dividend yield of 0.8%. Stock option expense is recognized over the vesting period, net of forfeitures. In addition, during the nine months ended September 30, 2014, we granted 133,823 performance vesting share (“PVS”) awards at a weighted grant-date fair value of $47.21 per share to key employees under the 2011 Plan. Each PVS award entitles the holder to one share of our common stock if the annual growth rate of revenue and return on invested capital targets are achieved over a three-year performance period. The actual payout may vary from 0% to 200% of an employee’s targeted award. The fair value of PVS awards is based on the market price of our stock at the grant date and is recognized as expense over the performance period, adjusted for estimated target outcomes and net of forfeitures. Total stock-based compensation expense was $3.6 million and $12.5 million for the three and nine months ended September 30, 2014, respectively. For the three and nine months ended September 30, 2013, total stock-based compensation expense was $5.2 million and $15.6 million, respectively.

The entire disclosure for compensation-related costs for equity-based compensation, which may include disclosure of policies, compensation plan details, allocation of equity compensation, incentive distributions, equity-based arrangements to obtain goods and services, deferred compensation arrangements, employee stock ownership plan details and employee stock purchase plan details.

+ References+ Details