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Earnings (Loss) Per Share (Tables) | 12 Months Ended
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Dec. 31, 2012
Earnings Per Share [Abstract] |
Schedule of antidilutive securities excluded from computation of earnings per share | Securities convertible into shares of common stock that were not considered in calculating earnings (loss) per common share, as inclusion would be anti-dilutive, are as follows (in thousands):
| December 31,
| 2012 |  | 2011 |  | 2010
Stock options under long-term incentive plans | — |  |  | — |  |  | 1,605 |
Stock warrants related to sale of preferred stock | — |  |  | — |  |  | 5,853 |
Convertible senior notes (if converted) | — |  |  | 4,681 |  |  | 4,879 |
Convertible preferred stock (if converted) | — |  |  | — |  |  | 4,872 |
| — |  |  | 4,681 |  |  | 17,209 |
Components of basic and diluted earnings per common share | Basic and diluted earnings (loss) per common share are as follows (in thousands, except per share data):
| Year ended December 31,
| 2012 |  | 2011 |  | 2010
Net income (loss) attributable to common stockholders - Basic | $ | 49,791 |  |  | $ | 26,540 |  |  | $ | (50,008 | )
Impact of assumed conversions: |  |  |  |  |
Interest on convertible notes | 1,959 |  |  | — |  |  | — |
Dividends on preferred stock | — |  |  | 141 |  |  | — |
Net income (loss) attributable to common stockholders - Diluted | $ | 51,750 |  |  | $ | 26,681 |  |  | $ | (50,008 | )
Weighted average common shares outstanding - Basic | 48,185 |  |  | 44,229 |  |  | 25,731 |
Assumed conversions: |  |  |  |  |
Incremental common shares from warrants | 1,560 |  |  | 2,222 |  |  | — |
Incremental common shares from stock options | 992 |  |  | 747 |  |  | — |
Incremental common shares from convertible preferred stock before conversion | — |  |  | 440 |  |  | — |
Incremental common shares from restricted stock units | 116 |  |  | — |  |  | — |
Incremental common shares from convertible senior notes | 2,701 |  |  | — |  |  | — |
Weighted average common shares outstanding - Diluted | 53,554 |  |  | 47,638 |  |  | 25,731 |
Basic earnings (loss) per common share | $ | 1.03 |  |  | $ | 0.60 |  |  | $ | (1.94 | )
Diluted earnings (loss) per common share | $ | 0.97 |  |  | $ | 0.56 |  |  | $ | (1.94 | )

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- Definition Tabular disclosure of securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) in the future that were not included in the computation of diluted EPS because to do so would increase EPS amounts or decrease loss per share amounts for the period presented, by antidilutive securities. + 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 (c) -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 -Subparagraph c -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. + Details
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- Definition Tabular disclosure of an entity's basic and diluted earnings per share calculations. + References No definition available. + Details
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