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Stock-Based Compensation | 9 Months Ended
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Sep. 30, 2013
Stock-Based Compensation [Abstract] |
Stock-Based Compensation | Stock-Based Compensation. We recognized $1.8 million and $1.9 million in pre-tax compensation expense related to stock options and restricted stock units during the three months ended September 30, 2013 and 2012, respectively, and $5.5 million and $6.7 million, during the nine months ended September 30, 2013 and 2012, respectively. During the nine months ended September 30, 2013, we granted approximately 638,000 stock options, 155,000 performance-based restricted stock units and 85,000 time-vesting restricted stock units. The stock options granted were valued using a Black-Scholes pricing model with the following assumptions: an expected volatility of 30.61% to 44.35%, a risk-free interest rate of 0.27% to 1.73%, an expected dividend yield of 2.2% to 2.4% and an expected life of 2.33 to 6.25 years. The weighted-average exercise price of the options granted during the nine months ended September 30, 2013, was $35.65 and the weighted-average grant-date fair value was $9.21. The restricted stock units are valued using the last trade before the day of the grant, adjusted for any provisions affecting fair value, such as the lack of dividends or dividend equivalents during the vesting period. The weighted-average grant date fair value of the restricted stock units granted during the nine months ended September 30, 2013, was $32.45.

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- Definition 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 Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5047-113901 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 50 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6406099&loc=d3e25284-112666 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 40 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6418621&loc=d3e17540-113929 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5444-113901 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Staff Accounting Bulletin (SAB) -Number Topic 14 + Details
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