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OTHER INCOME
9 Months Ended
Sep. 30, 2011
Other Income and Expenses [Abstract] 
Other Income
15.  OTHER INCOME
Other income consisted of the following (in thousands):
   
Three months ended
  
Nine months ended
 
   
September 30,
  
September 30,
 
   
2011
  
2010
  
2011
  
2010
 
Discount amortization on prepaid royalty
 $1,041  $0  $2,120  $0 
Gain on purchase transaction
  0   0   919   0 
Interest income
  119   92   357   266 
Investment gain (loss) on contractual obligations
  (1,255)  638   (1,111)  285 
Other expense
  (461)  (329)  (378)  (244)
   $(556) $401  $1,907  $307