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OTHER INCOME (Details) (USD $)
In Thousands, unless otherwise specified
3 Months Ended 9 Months Ended
Sep. 30, 2012
Sep. 30, 2011
Sep. 30, 2012
Sep. 30, 2011
OTHER INCOME, NET [Abstract]        
Discount amortization on prepaid royalty $ 910 $ 1,041 $ 2,882 $ 2,120
Other income (expense) 474 (461) 683 (378)
Gain (loss) related to contractual obligation investments 492 (1,255) 1,287 (1,111)
Interest income 372 119 757 357
Building rental income 191 0 554 0
Gain on purchase transaction 0 0 0 919
Nonoperating Income (Expense) $ 2,439 $ (556) $ 6,163 $ 1,907