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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, 2010 $ 1,802,424 $ 691 $ 3,500,292 $ (20,225) $ (203,996) $ (1,667,314) $ 192,976
Increase (Decrease) in Stockholders' Equity              
Treasury stock purchased (2,415)       (2,415)    
Options exercised 487   487        
Shares issued in employee stock purchase plan 940   940        
Stock-based compensation, net of forfeitures 10,459 8 10,318       133
Income tax benefit from stock-based compensation expense (221)   (221)        
Net proceeds from sale of Partnership units, net of tax 215,871   123,681       92,190
Cash distribution to noncontrolling unitholders of the Partnership (15,841)           (15,841)
Comprehensive income (loss):              
Net loss (60,688)         (58,056) (2,632)
Derivative gain (loss), net of reclassifications to earnings (20)     1,579     (1,599)
Adjustments from sale of Partnership units 1,184     1,184      
Amortization of payments to terminate interest rate swaps, net of tax 9,722     9,722      
Foreign currency translation adjustment 16,186     16,186      
Balance at Jun. 30, 2011 1,978,088 699 3,635,497 8,446 (206,411) (1,725,370) 265,227
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 loss (159,611)         (147,113) (12,498)
Derivative gain (loss), net of reclassifications to earnings 1,642     2,835     (1,193)
Adjustments from sale of Partnership units 360     360      
Amortization of payments to terminate 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