v2.4.0.8

Earnings Per Share (Narrative) (Details) (USD $) In Millions, except Share data, unless otherwise specified | 3 Months Ended | 9 Months Ended |  |  |  | 3 Months Ended | 9 Months Ended | 3 Months Ended | 9 Months Ended |  |
--- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Sep. 30, 2013 | Sep. 30, 2012 | Sep. 30, 2013 | Sep. 30, 2012 | Dec. 31, 2012 | Sep. 30, 2013 2.50% convertible senior notes due August 15, 2013 [Member] | Mar. 31, 2008 2.50% convertible senior notes due August 15, 2013 [Member] | Sep. 30, 2013 Restricted stock and PSU's [Member] | Sep. 30, 2012 Restricted stock and PSU's [Member] | Sep. 30, 2013 Restricted stock and PSU's [Member] | Sep. 30, 2012 Restricted stock and PSU's [Member] | Sep. 30, 2013 Stock Options [Member] | Sep. 30, 2012 Stock Options [Member] | Sep. 30, 2013 Stock Options [Member] | Sep. 30, 2012 Stock Options [Member] | Sep. 30, 2013 Common stock [Member] | Sep. 30, 2012 Common stock [Member]
Earnings Per Share, Diluted, by Common Class, Including Two Class Method [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Stock options to purchase shares | 5,653,638 | [1] |  | 5,653,638 | [1] |  |  | 7,545,777 | [1] |  |  | 6,407,977 | 6,268,114 | 6,407,977 | 6,268,114 |  |  |  |  | 5,653,638 | 9,299,981
Weighted average number diluted shares outstanding | 3,773,791 |  | 4,284,300 | 3,854,863 |  | 3,970,984 |  |  |  |  |  | 4,826,614 | 6,205,162 | 4,567,960 | 5,066,223 | 4,397,210 | 6,048,811 | 4,397,210 | 6,047,125 |  |
Incremental common shares attributable to conversion of debt securities |  |  |  |  |  | 20,891 | [2] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument, interest rate |  |  |  |  |  |  |  |  |  | 2.50% | 2.50% |  |  |  |  |  |  |  |  |  |
Debt instrument, principal outstanding |  |  |  |  |  |  |  |  |  |  | $ 475.0 |  |  |  |  |  |  |  |  |  |
[1] | No stock option awards were granted during the three and nine months ended September 30, 2013.
[2] | In June 2012, the remaining $0.5 million of our 3.75% convertible notes outstanding was converted into 34,482 shares of common stock in accordance with the terms of the notes.

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- Definition Amount of long-term debt before deduction of unamortized discount or premium. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt, with initial maturities beyond one year or the normal operating cycle, if longer. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 20 -Article 5 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 22 -Article 5 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.22) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 16 -Article 9 + Details
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