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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, 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 (3,368)       (3,368)    
Options exercised 4,076 2 4,074        
Shares issued in employee stock purchase plan 345   345        
Stock-based compensation, net of forfeitures 4,131 7 4,035       89
Income tax benefit from stock-based compensation expense 1,207   1,207        
Adjustments from changes in ownership of Partnership (17,665)   31,573       (49,238)
Cash distribution to noncontrolling unitholders of the Partnership (15,262)           (15,262)
Comprehensive income (loss):              
Net income 58,791         50,205 8,586
Derivatives gain (loss), net of reclassifications to earnings and tax 1,081     197     884
Adjustments from changes in ownership of Partnership (703)     (703)      
Amortization of terminated interest rate swaps, net of tax 325     325      
Foreign currency translation adjustment (5,262)     (5,262)      
Balance at Mar. 31, 2013 1,729,955 722 3,751,992 18,466 (212,727) (1,997,203) 168,705
Balance at Dec. 31, 2013 1,813,428 725 3,769,429 30,078 (213,898) (1,924,244) 151,338
Increase (Decrease) in Stockholders' Equity              
Treasury stock purchased (5,349)       (5,349)    
Options exercised 8,520 4 8,516        
Cash dividends (9,989)         (9,989)  
Shares issued in employee stock purchase plan 404   404        
Stock-based compensation, net of forfeitures 7,269 4 6,797       468
Income tax benefit from stock-based compensation expense 6,396   6,396        
Cash distribution to noncontrolling unitholders of the Partnership (15,869)           (15,869)
Comprehensive income (loss):              
Net income 34,894         32,596 2,298
Derivatives gain (loss), net of reclassifications to earnings and tax (570)     (596)     26
Amortization of terminated interest rate swaps, net of tax 780     780      
Foreign currency translation adjustment 1,134     1,134      
Balance at Mar. 31, 2014 $ 1,841,048 $ 733 $ 3,791,542 $ 31,396 $ (219,247) $ (1,901,637) $ 138,261