Consolidated Statement of Stockholders' Equity - 6 months ended Jun. 30, 2015 - USD ($)
$ in Thousands
Total
Common Stock Shares
Common Stock Par Value
Capital in Excess of Par Value
Accumulated Deficit
Accumulated Other Comprehensive Loss
Treasury Stock
Beginning balance (in shares) at Dec. 31, 2014   411,824,039         (473,599)
Beginning balance at Dec. 31, 2014 $ 3,318,101   $ 4,118 $ 4,361,320 $ (1,041,392) $ (1,083) $ (4,862)
Increase (Decrease) in Stockholders' Equity [Roll Forward]              
Net income (loss) attributable to common stockholders 86,215       86,215    
Other comprehensive income (114)         (114)  
Dividends declared on common stock (146,177)       (146,177)    
Repurchase of shares of common stock (in shares)             (60,603)
Repurchase of shares of common stock (720)           $ (720)
Issuance of shares of common stock, net (in shares)   29,610,100          
Issuance of shares of common stock, net 347,255   296 346,959      
Exercise of stock options (in shares)   5,000          
Exercise of stock options 46     46      
Stock based compensation, net (in shares)   607,986          
Stock-based compensation, net 6,733   6 7,015 (288)    
Ending balance (in shares) at Jun. 30, 2015   442,047,125         (534,202)
Ending balance at Jun. 30, 2015 $ 3,611,339   $ 4,420 $ 4,715,340 $ (1,101,642) $ (1,197) $ (5,582)