Stock-Based Compensation (Notes)

3 Months Ended

Mar. 31, 2013

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

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

Stock-Based Compensation

On February 12, 2013, the Company awarded 367,250 annual service-based stock options under the Company's 2009 Long-Term Incentive Plan (the “2009 LTIP”) that vest and become exercisable over a five-year period in 20% increments beginning on December 31, 2013 (subject to the applicable recipient's continued employment on the applicable vesting date). The stock options were granted at an exercise price of $23.66, which represents the closing price of the Company's common shares on the date of grant. The grant date fair value of the stock options ($11.97) was determined at the date of grant using the Black-Scholes option pricing model.

Total recorded compensation expense relating to equity awards granted under the 2009 LTIP was approximately $0.5 million for the three months ended March 31, 2013, which includes compensation cost recognized on the basis of the proportion of service rendered over the period of February 12, 2013 through March 31, 2013 with respect to the stock options discussed above.