XML 48 R67.htm IDEA: XBRL DOCUMENT v2.4.0.6
Debt Schedule of Carrying Amount of Debt and Equity Components (Details) (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2011
Dec. 31, 2010
Debt Instrument [Line Items]    
Net carrying amount of debt component $ 0 $ 218,268
Convertible Subordinated Debt [Member]
   
Debt Instrument [Line Items]    
Face value of convertible notes 0 223,604
Unamortized discount 0 (5,336)
Net carrying amount of debt component 0 218,268
Carrying amount of equity component $ 31,831 $ 31,831