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CONSOLIDATED STATEMENTS OF EQUITY (USD $)
In Thousands, except Share data, 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
Balance (in shares) at Dec. 31, 2010         (5,841,087)    
Balance (in shares) at Dec. 31, 2010   69,071,027          
Increase (Decrease) in Stockholders' Equity              
Treasury stock purchased (2,941)       (2,941)    
Treasury stock purchased (in shares)         (157,756)    
Options exercised 526   526        
Options exercised (in shares)   32,545          
Shares issued in employee stock purchase plan 1,887 1 1,886        
Shares issued in employee stock purchase plan (in shares)   153,489          
Stock-based compensation, net of forfeitures 20,153 12 20,006       135
Stock-based compensation, net of forfeitures (in shares)   1,149,949          
Stock-based compensation, net of forfeitures (in shares)         (144,746)    
Income tax benefit from stock-based compensation expense (1,092)   (1,092)        
Net proceeds from sale of Partnership units, net of tax 216,094   123,904       92,190
Cash distribution to noncontrolling unitholders of the Partnership (39,870)           (39,870)
Other (189)   (190)       1
Comprehensive income (loss):              
Net income (loss) (339,618)         (340,608) 990
Derivatives gain (loss), net of reclassifications to earnings and tax (2,126)     1,490     (3,616)
Adjustments from changes in ownership of Partnership 1,184     1,184      
Amortization of terminated interest rate swaps, net of tax 20,267     20,267      
Foreign currency translation adjustment 3,343     3,343      
Balance at Dec. 31, 2011 1,680,042 704 3,645,332 6,059 (206,937) (2,007,922) 242,806
Balance (in shares) at Dec. 31, 2011         (6,143,589)    
Balance (in shares) at Dec. 31, 2011   70,407,010          
Increase (Decrease) in Stockholders' Equity              
Treasury stock purchased (2,422)       (2,422)    
Treasury stock purchased (in shares)         (157,233)    
Options exercised 562   562        
Options exercised (in shares)   34,285          
Shares issued in employee stock purchase plan 1,635 1 1,634        
Shares issued in employee stock purchase plan (in shares)   132,784          
Stock-based compensation, net of forfeitures 15,970 8 15,373       589
Stock-based compensation, net of forfeitures (in shares)   717,151          
Stock-based compensation, net of forfeitures (in shares)         (75,604)    
Income tax benefit from stock-based compensation expense (1,345)   (1,345)        
Net proceeds from sale of Partnership units, net of tax 85,122   49,202       35,920
Cash distribution to noncontrolling unitholders of the Partnership (57,084)           (57,084)
Comprehensive income (loss):              
Net income (loss) (37,169)         (39,486) 2,317
Derivatives gain (loss), net of reclassifications to earnings and tax 5,879     6,781     (902)
Adjustments from changes in ownership of Partnership 360     360      
Amortization of terminated interest rate swaps, net of tax 6,947     6,947      
Foreign currency translation adjustment 3,762     3,762      
Balance at Dec. 31, 2012 1,702,259 713 3,710,758 23,909 (209,359) (2,047,408) 223,646
Balance (in shares) at Dec. 31, 2012 (6,376,426)       (6,376,426)    
Balance (in shares) at Dec. 31, 2012   71,291,230          
Increase (Decrease) in Stockholders' Equity              
Treasury stock purchased (4,539)       (4,539)    
Treasury stock purchased (in shares) (173,267)       (173,267)    
Options exercised 8,321 4 8,317        
Options exercised (in shares)   459,416          
Shares issued in employee stock purchase plan 1,632 1 1,631        
Shares issued in employee stock purchase plan (in shares)   66,259          
Stock-based compensation, net of forfeitures 16,248 7 15,509       732
Stock-based compensation, net of forfeitures (in shares)   683,868          
Stock-based compensation, net of forfeitures (in shares)         (32,375)    
Income tax benefit from stock-based compensation expense 1,782   1,782        
Adjustments from changes in ownership of Partnership (17,665)   31,573       (49,238)
Cash distribution to noncontrolling unitholders of the Partnership (61,959)           (61,959)
Other (141)   (141)        
Comprehensive income (loss):              
Net income (loss) 155,742         123,164 32,578
Derivatives gain (loss), net of reclassifications to earnings and tax 5,207     (372)     5,579
Adjustments from changes in ownership of Partnership (703)     (703)      
Amortization of terminated interest rate swaps, net of tax 2,713     2,713      
Foreign currency translation adjustment 4,531     4,531      
Balance at Dec. 31, 2013 $ 1,813,428 $ 725 $ 3,769,429 $ 30,078 $ (213,898) $ (1,924,244) $ 151,338
Balance (in shares) at Dec. 31, 2013 (6,582,068)       (6,582,068)    
Balance (in shares) at Dec. 31, 2013   72,500,773