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Debt (Tables)
12 Months Ended
Dec. 31, 2012
Debt [Abstract]  
Fair value of debt
The par value and fair value of our debt at December 31, 2012 and 2011 appears in the table below.
 
   
Par Value
  
Total Fair Value
  
Quoted Prices in
Active Markets
for Identical
Assets (Level 1)
  
Significant
Other
Observable
Inputs
(Level 2)
  
Significant
Unobservable
Inputs
(Level 3)
 
   
(In thousands)
 
December 31, 2012
               
Liabilities:
               
Senior Notes
 $100,118  $79,594  $79,594  $-  $- 
Convertible Senior Notes
  345,000   242,880   242,880   -   - 
Convertible Junior Subordinated Debentures
  389,522   173,096   -   173,096   - 
Total Debt
 $834,640  $495,570  $322,474  $173,096  $- 
                      
December 31, 2011
                    
Liabilities:
                    
Senior Notes
 $171,000  $116,708  $116,708  $-  $- 
Convertible Senior Notes
  345,000   202,256   202,256   -   - 
Convertible Junior Subordinated Debentures
  389,522   189,648   -   189,648   - 
Total Debt
 $905,522  $508,612  $318,964  $189,648  $-