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CONDENSED CONSOLIDATED STATEMENT OF CHANGES IN EQUITY (USD $) In Thousands | Total | Convertible Perpetual Preferred Stock | Common Stock | Additional Paid-In Capital | Treasury Stock | Accumulated Deficit | Noncontrolling Interest
--- | --- | --- | --- | --- | --- | --- | ---
Beginning Balance at Dec. 31, 2012 | $ 3,862,455 | $ 8 | $ 476 | $ 5,228,019 | $ (8,602) | $ (2,851,048) | $ 1,493,602
Beginning Balance (in shares) at Dec. 31, 2012 | 490,359 |  | 490,359 |  |  |  |
Beginning Balance (in shares) at Dec. 31, 2012 | 7,650 | 7,650 |  |  |  |  |
Distributions to noncontrolling interest owners | (51,256) |  |  |  |  |  | (51,256)
Purchase of treasury stock | (11,216) |  |  |  | (11,216) |  |
Retirement of treasury stock | 0 |  |  | (11,216) | 11,216 |  |
Stock purchases - retirement plans, net of distributions (in shares) |  |  | (59) |  |  |  |
Stock purchases - retirement plans, net of distributions | 97 |  |  | 469 | (372) |  |
Stock-based compensation | 20,552 |  |  | 20,552 |  |  |
Issuance of restricted stock awards, net of cancellations (in shares) |  |  | 3,027 |  |  |  |
Issuance of restricted stock awards, net of cancellations | 0 |  | 3 | (3) |  |  |
Net loss | (531,259) |  |  |  |  | (479,340) | (51,919)
Convertible perpetual preferred stock dividends | (13,881) |  |  |  |  | (13,881) |
Ending Balance at Mar. 31, 2013 | $ 3,275,492 | $ 8 | $ 479 | $ 5,237,821 | $ (8,974) | $ (3,344,269) | $ 1,390,427
Ending Balance (in shares) at Mar. 31, 2013 | 493,327 |  | 493,327 |  |  |  |
Ending Balance (in shares) at Mar. 31, 2013 | 7,650 | 7,650 |  |  |  |  |

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