Consolidated Statement of Stockholders' Equity and Comprehensive Income (Loss) (USD $)
In Thousands
Total
Class A Common Stock
Class B Common Stock
Treasury Stock
Paid-in-Capital
Retained Earnings
Accumulated Other Comprehensive Income/(Loss)
Comprehensive Income
Balance at Dec. 31, 2009$ 534,234$ 60$ 28$ (2,474)$ 448,556$ 95,263$ (7,199) 
Balance (in shares) at Dec. 31, 2009 59,17028,169     
Comprehensive income (loss):        
Net income77,741    77,741 77,741
Unrealized gain on derivatives designated and qualified as cash flow hedges, net of tax of $2,718 and $1,367 for the nine months ended on September 30, 2011 and 2010, respectively2,389     2,3892,389
Foreign currency translation adjustments501     501501
Comprehensive income80,631      80,631
Issuance of common stock201  1974   
Issuance of common stock (in shares) 29      
Purchase of treasury stock0  0    
Purchase of treasury stock (in shares)   0    
Preferred stock dividends(15,261)    (15,261)  
Non-cash stock-based compensation2,376   2,376   
Balance at Sep. 30, 2010602,1816028(2,277)450,936157,743(4,309) 
Balance (in shares) at Sep. 30, 2010 59,19928,169     
Balance at Dec. 31, 2010619,4836028(2,277)451,728171,224(1,280) 
Balance (in shares) at Dec. 31, 2010 59,19928,169     
Comprehensive income (loss):        
Net income94,590    94,590 94,590
Unrealized gain on derivatives designated and qualified as cash flow hedges, net of tax of $2,718 and $1,367 for the nine months ended on September 30, 2011 and 2010, respectively4,751     4,7514,751
Foreign currency translation adjustments(1,277)     (1,277)(1,277)
Comprehensive income98,064      98,064
Issuance of common stock237,25316  237,237   
Issuance of common stock (in shares) 16,000      
Conversion of stock 14(14)     
Conversion of stock (in shares) 14,387(14,387)     
Preferred stock dividends(4,726)    (4,726)  
Exercise of stock options18,6211  18,620   
Exercise of stock options (in shares) 1,572      
Non-cash stock-based compensation2,895   2,895   
Balance at Sep. 30, 2011$ 971,590$ 91$ 14$ (2,277)$ 710,480$ 261,088$ 2,194 
Balance (in shares) at Sep. 30, 2011 91,15813,782