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OTHER INCOME (Details) (USD $)
In Thousands, unless otherwise specified
3 Months Ended 6 Months Ended
Jun. 30, 2012
Jun. 30, 2011
Jun. 30, 2012
Jun. 30, 2011
OTHER INCOME, NET [Abstract]        
Discount amortization on prepaid royalty $ 933 $ 1,079 $ 1,972 $ 1,079
Building rental income 188 0 363 0
Interest income 180 93 385 238
Gain on purchase transaction 0 919 0 919
Other income (expense) (215) 128 209 83
Gain (loss) related to contractual obligation investments (473) 51 795 144
Nonoperating Income (Expense) $ 613 $ 2,270 $ 3,724 $ 2,463