Quarterly report pursuant to Section 13 or 15(d)

Earnings/(Loss) Per Share Details Textual (Details)

v2.4.0.8
Earnings/(Loss) Per Share Details Textual (Details) (USD $)
6 Months Ended
Jun. 30, 2013
Dec. 31, 2012
Debt Instrument [Line Items]    
Senior, senior subordinated, convertible senior notes $ 798,215,000 $ 722,797,000
1.875% convertible senior notes due 2032 [Member]
   
Debt Instrument [Line Items]    
Senior, senior subordinated, convertible senior notes 126,500,000 126,500,000
Debt instrument, interest rate, stated percentage 1.875%  
Debt instrument, convertible, conversion ratio 17.1985  
Conversion principal amount $ 1,000