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Earnings Per Share | 9 Months Ended
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Sep. 30, 2013
Earnings Per Share [Abstract] |
Earnings Per Share | Earnings Per Share Basic earnings per common share is calculated by dividing net income by the weighted average number of common shares outstanding for the period. Diluted earnings per common share is calculated by dividing net income, adjusted for the effect of assumed conversion of convertible notes, by the weighted average number of common shares outstanding combined with dilutive common share equivalents outstanding, if the effect is dilutive. In connection with the sale of the 2008 Notes, the Company entered into a Share Lending Agreement for 3.8 million shares of the Company’s common stock (see Note 10). Contractual undertakings of the Borrower had the effect of substantially eliminating the economic dilution that otherwise would result from the issuance of the Borrowed Shares, and all shares outstanding under the Share Lending Agreement were contractually obligated to be returned to the Company. As a result, shares loaned under the Share Lending Agreement were not considered outstanding for the purpose of computing and reporting earnings per share. The Share Lending Agreement was terminated on January 22, 2013 upon the return of all Borrowed Shares to the Company. On February 15, 2013, the Company repurchased the remaining $5.2 million of outstanding 2008 Notes for cash. Following this repurchase, the Company no longer has any outstanding convertible senior notes. For the nine months ended September 30, 2013 and 2012, the Company’s convertible notes were excluded from the calculation of diluted earnings per common share, as inclusion was anti-dilutive. In addition, for the three and nine months ended September 30, 2013 and 2012, approximately 0.1 million stock options with an exercise price in excess of the average market price of the Company’s common stock were excluded from the calculation of diluted earnings per common share. Basic and diluted earnings per common share are as follows (in thousands, except per share data):
| Three months ended September 30, |  | Nine months ended September 30,
| 2013 |  | 2012 |  | 2013 |  | 2012
Net income - Basic | $ | 8,968 |  |  | $ | 9,806 |  |  | $ | 25,173 |  |  | $ | 26,590 |
Impact of assumed conversions: |  |  |  |  |  |  |
Interest on convertible notes | — |  |  | 414 |  |  | — |  |  | — |
Net income - Diluted | $ | 8,968 |  |  | $ | 10,220 |  |  | $ | 25,173 |  |  | $ | 26,590 |
Weighted average common shares outstanding - Basic | 52,742 |  |  | 48,384 |  |  | 50,819 |  |  | 48,054 |
Assumed conversions: |  |  |  |  |  |  |
Incremental common shares from warrants | 1,365 |  |  | 1,493 |  |  | 1,404 |  |  | 1,617 |
Incremental common shares from stock options | 1,134 |  |  | 1,003 |  |  | 1,143 |  |  | 986 |
Incremental common shares from restricted stock units | 76 |  |  | 158 |  |  | 41 |  |  | 80 |
Incremental common shares from convertible senior notes | — |  |  | 2,440 |  |  | — |  |  | — |
Weighted average common shares outstanding - Diluted | 55,317 |  |  | 53,478 |  |  | 53,407 |  |  | 50,737 |
Basic earnings per common share | $ | 0.17 |  |  | $ | 0.20 |  |  | $ | 0.50 |  |  | $ | 0.55 |
Diluted earnings per common share | $ | 0.16 |  |  | $ | 0.19 |  |  | $ | 0.47 |  |  | $ | 0.52 |

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- Definition The entire disclosure for earnings per share. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 128 -Paragraph 40 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.21) -URI http://asc.fasb.org/extlink&oid=6880815&loc=d3e20235-122688 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=7655603&loc=d3e1252-109256 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 55 -Paragraph 52 -URI http://asc.fasb.org/extlink&oid=16381557&loc=d3e4984-109258 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 45 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=7655603&loc=d3e1278-109256 + Details
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