Share-Based Payments	9 Months Ended
Share-Based Payments	Sep. 30, 2013
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Share-Based Payments	Share-Based Payments During the nine months ended September 30, 2013, the Company granted 168,700 stock options with an exercise price equal to the closing market price of a share of Common Stock on the date of grant. The fair value of each option is estimated on the date of grant using the Black-Scholes option pricing model, which resulted in a weighted average grant date fair value per share of $6.50. During the nine months ended September 30, 2013, the Company also granted 86,144 shares of time-based restricted stock and 65,486 shares of total return-based restricted stock with weighted average grant date fair values per share of $36.64 and $31.73, respectively. We recorded stock-based compensation expense of $1.2 million and $2.0 million during the three months ended September 30, 2013 and 2012, respectively, and $5.9 million and $6.5 million during the nine months ended September 30, 2013 and 2012, respectively. At September 30, 2013, there was $5.0 million of total unrecognized stock-based compensation costs, which will be recognized over a weighted average remaining contractual term of 2.4 years.

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.

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