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Equity (Tables) | 12 Months Ended
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Dec. 31, 2012
Equity [Abstract] |
Preferred Stock | Preferred Stock The following table presents information regarding the Company’s preferred stock (in thousands):
| December 31,
| 2012 |  | 2011
Shares authorized | 50,000 |  |  | 50,000 |
Shares outstanding at end of period |  |  |
8.5% Convertible perpetual preferred stock | 2,650 |  |  | 2,650 |
6.0% Convertible perpetual preferred stock | 2,000 |  |  | 2,000 |
7.0% Convertible perpetual preferred stock | 3,000 |  |  | 3,000 |
Preferred Stock Dividends | Paid and unpaid dividends included in the calculation of income available to the Company’s common stockholders and the Company’s basic earnings per share calculation for the years ended December 31, 2012, 2011 and 2010 as presented in the accompanying consolidated statements of operations, are included in tables below (in thousands):
| Dividends Paid |  | Dividends Unpaid |  | Total
Year Ended December 31, 2012 |  |  |  |  |
8.5% Convertible perpetual preferred stock | $ | 14,078 |  |  | $ | 8,447 |  |  | $ | 22,525 |
6.0% Convertible perpetual preferred stock | 6,500 |  |  | 5,500 |  |  | 12,000 |
7.0% Convertible perpetual preferred stock | 18,375 |  |  | 2,625 |  |  | 21,000 |
Total | $ | 38,953 |  |  | $ | 16,572 |  |  | $ | 55,525 |
Year Ended December 31, 2011 |  |  |  |  |
8.5% Convertible perpetual preferred stock | $ | 14,078 |  |  | $ | 8,447 |  |  | $ | 22,525 |
6.0% Convertible perpetual preferred stock | 6,500 |  |  | 5,500 |  |  | 12,000 |
7.0% Convertible perpetual preferred stock | 18,433 |  |  | 2,625 |  |  | 21,058 |
Total | $ | 39,011 |  |  | $ | 16,572 |  |  | $ | 55,583 |
Year Ended December 31, 2010 |  |  |  |  |
8.5% Convertible perpetual preferred stock | $ | 14,079 |  |  | $ | 8,446 |  |  | $ | 22,525 |
6.0% Convertible perpetual preferred stock | 6,000 |  |  | 6,000 |  |  | 12,000 |
7.0% Convertible perpetual preferred stock | — |  |  | 2,917 |  |  | 2,917 |
Total | $ | 20,079 |  |  | $ | 17,363 |  |  | $ | 37,442 |
Common Stock | Common Stock The following table presents information regarding the Company’s common stock (in thousands):
| December 31,
| 2012 |  | 2011
Shares authorized | 800,000 |  |  | 800,000 |
Shares outstanding at end of period | 490,359 |  |  | 411,953 |
Shares held in treasury | 1,219 |  |  | 874 |
Restricted Stock Activity | Restricted stock activity for the years ended December 31, 2012, 2011 and 2010 was as follows (shares in thousands):
| Number of Shares |  | Weighted- Average Grant Date Fair Value
Unvested restricted shares outstanding at December 31, 2009 | 5,322 |  |  | $ | 16.80 |
Granted(1) | 6,210 |  |  | $ | 7.87 |
Vested(1) | (1,613 | ) |  | $ | 18.28 |
Forfeited / Canceled | (443 | ) |  | $ | 12.74 |
Unvested restricted shares outstanding at December 31, 2010 | 9,476 |  |  | $ | 10.89 |
Granted | 8,003 |  |  | $ | 8.95 |
Vested | (3,270 | ) |  | $ | 12.91 |
Forfeited / Canceled | (823 | ) |  | $ | 9.17 |
Unvested restricted shares outstanding at December 31, 2011 | 13,386 |  |  | $ | 9.34 |
Granted | 7,604 |  |  | $ | 7.46 |
Vested | (4,394 | ) |  | $ | 10.73 |
Forfeited / Canceled | (1,268 | ) |  | $ | 8.54 |
Unvested restricted shares outstanding at December 31, 2012 | 15,328 |  |  | $ | 8.07 |
____________________
(1) | Excludes approximately 0.7 million restricted shares from stock awards assumed in the Arena Acquisition. All of these awards had vested as of December 31, 2010.

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- Definition Tabular disclosure of the number and weighted-average grant date fair value for restricted stock units that were outstanding at the beginning and end of the year, and the number of restricted stock units that were granted, vested, or forfeited during the year. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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