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CONSOLIDATED STATEMENTS OF CHANGES IN EQUITY (USD $)
In Thousands, except Share data
Total
Common Stock [Member]
Additional Paid-in Capital [Member]
Retained Earnings [Member]
Accumulated Other Comprehensive Income (Loss) [Member]
Noncontrolling Interest [Member]
Balance at at Dec. 31, 2010 $ 904,817 $ 1,007 $ 467,500 $ 445,456 $ (9,392) $ 246
Balance at (in shares) at Dec. 31, 2010   100,726,947        
Net income (loss) 78,323       78,331    (8)
Issuance of common stock 354,445 288 354,157         
Issuance of common stock (in shares)   28,750,000        
Deemed dividends related to beneficial conversion feature of preferred stock 0          
Preferred stock dividend 0          
Conversion of 3.25% Convertible Notes 0          
Exercise of common stock options 1,273 4 1,269         
Exercise of common stock options (in shares)   410,977        
Equity-based compensation 3,195    3,195         
Equity-based compensation (in shares)   11,364        
Distribution to non-controlling interest holder (247)             (247)
Other comprehensive income (loss) 1,505          1,496 9
Balance at at Dec. 31, 2011 1,343,311 1,299 826,121 523,787 (7,896)   
Balance at (in shares) at Dec. 31, 2011   129,899,288        
Net income (loss) 180,923       180,923      
Discount – Preferred stock beneficial conversion feature 8,688    8,688         
Deemed dividends related to beneficial conversion feature of preferred stock (60)     (60)    
Preferred stock dividend (85)     (85)    
Conversion of 3.25% Convertible Notes 56,410 46 56,364      
Conversion of 3.25% Convertible Notes (in shares)   4,635,159        
Exercise of common stock options 6,287 11 6,276         
Exercise of common stock options (in shares)   1,082,944        
Equity-based compensation 14,493    14,493         
Equity-based compensation (in shares)   20,541        
Other comprehensive income (loss) 1,455          1,455   
Balance at at Dec. 31, 2012 1,611,422 1,356 911,942 704,565 (6,441)   
Balance at (in shares) at Dec. 31, 2012 135,637,932 135,637,932        
Net income (loss) 294,149 0 0 294,149 0 0
Deemed dividends related to beneficial conversion feature of preferred stock (6,989)     (6,989)    
Preferred stock dividend (5,031)     (5,031)    
Conversion of 3.25% Convertible Notes             
Conversion of preferred stock 100,000 31 99,969      
Conversion of preferred stock (in shares)   3,145,640        
Repurchase of common stock (217,903) (42) (217,861)      
Repurchase of common stock (in shares)   (4,271,347)        
Exercise of common stock options (2,605) 7 (2,612) 0 0 0
Exercise of common stock options (in shares)   652,015        
Equity-based compensation 26,989 0 26,989 0 0 0
Equity-based compensation (in shares)   12,031        
Other comprehensive income (loss) (3,710) 0 0 0 (3,710) 0
Balance at at Dec. 31, 2013 $ 1,796,322 $ 1,352 $ 818,427 $ 986,694 $ (10,151) $ 0
Balance at (in shares) at Dec. 31, 2013 0 135,176,271