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CONDENSED CONSOLIDATED STATEMENTS OF EQUITY (USD $) In Thousands, unless otherwise specified | Total | Common Stock | Additional Paid-in Capital | Accumulated Other Comprehensive Income (Loss) | Treasury Stock | Accumulated Deficit | Noncontrolling Interest
--- | --- | --- | --- | --- | --- | --- | ---
Balance at Dec. 31, 2011 | $ 1,680,042 | $ 704 | $ 3,645,332 | $ 6,059 | $ (206,937) | $ (2,007,922) | $ 242,806
Increase (Decrease) in Stockholders' Equity |  |  |  |  |  |  |
Treasury stock purchased | (1,842) |  |  |  | (1,842) |  |
Shares issued in employee stock purchase plan | 888 | 1 | 887 |  |  |  |
Stock-based compensation, net of forfeitures | 8,627 | 7 | 8,295 |  |  |  | 325
Income tax benefit from stock-based compensation expense | (1,730) |  | (1,730) |  |  |  |
Net proceeds from sale of Partnership units, net of tax | 85,122 |  | 49,202 |  |  |  | 35,920
Cash distribution to noncontrolling unitholders of the Partnership | (27,017) |  |  |  |  |  | (27,017)
Comprehensive income (loss): |  |  |  |  |  |  |
Net income (loss) | (159,611) |  |  |  |  | (147,113) | (12,498)
Derivative gain (loss), net of reclassifications to earnings and tax | 1,642 |  |  | 2,835 |  |  | (1,193)
Adjustments from changes in ownership of Partnership | 360 |  |  | 360 |  |  |
Amortization of terminated interest rate swaps, net of tax | 7,833 |  |  | 7,833 |  |  |
Foreign currency translation adjustment | (4,759) |  |  | (4,759) |  |  |
Balance at Jun. 30, 2012 | 1,589,555 | 712 | 3,701,986 | 12,328 | (208,779) | (2,155,035) | 238,343
Balance at Dec. 31, 2012 | 1,702,259 | 713 | 3,710,758 | 23,909 | (209,359) | (2,047,408) | 223,646
Increase (Decrease) in Stockholders' Equity |  |  |  |  |  |  |
Treasury stock purchased | (3,515) |  |  |  | (3,515) |  |
Options exercised | 5,789 | 3 | 5,786 |  |  |  |
Shares issued in employee stock purchase plan | 805 |  | 805 |  |  |  |
Stock-based compensation, net of forfeitures | 8,387 | 7 | 8,035 |  |  |  | 345
Income tax benefit from stock-based compensation expense | 867 |  | 867 |  |  |  |
Adjustments from changes in ownership of Partnership | (17,665) |  | 31,573 |  |  |  | (49,238)
Cash distribution to noncontrolling unitholders of the Partnership | (30,679) |  |  |  |  |  | (30,679)
Other | (84) |  | (84) |  |  |  |
Comprehensive income (loss): |  |  |  |  |  |  |
Net income (loss) | 83,295 |  |  |  |  | 59,540 | 23,755
Derivative gain (loss), net of reclassifications to earnings and tax | 6,183 |  |  | 814 |  |  | 5,369
Adjustments from changes in ownership of Partnership | (703) |  |  | (703) |  |  |
Amortization of terminated interest rate swaps, net of tax | 1,009 |  |  | 1,009 |  |  |
Foreign currency translation adjustment | (3,770) |  |  | (3,770) |  |  |
Balance at Jun. 30, 2013 | $ 1,752,178 | $ 723 | $ 3,757,740 | $ 21,259 | $ (212,874) | $ (1,987,868) | $ 173,198

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