XML 40 R45.htm IDEA: XBRL DOCUMENT v2.4.0.6
Convertible Notes (Details) (USD $)
In Thousands, unless otherwise specified
Mar. 31, 2013
Dec. 31, 2012
Convertible Notes    
Total long-term convertible notes $ 151,487 $ 147,556
5% Convertible Senior Notes due 2014
   
Convertible Notes    
5% Convertible Senior Notes due 2014 (the “2014 Notes”) 172,500 172,500
Unamortized discount (21,013) (24,944)
Total convertible notes 151,487 147,556
Total long-term convertible notes $ 151,487 $ 147,556