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OTHER INCOME (Details) (USD $)
In Thousands, unless otherwise specified
3 Months Ended 6 Months Ended
Jun. 30, 2013
Jun. 30, 2012
Jun. 30, 2013
Jun. 30, 2012
Component of Other Income, Nonoperating [Line Items]        
Interest income $ 1,530 $ 180 $ 1,931 $ 385
Discount amortization on prepaid royalty 787 933 1,703 1,972
Other income (expense) 468 181 1,238 665
Income (Loss) from Equity Method Investments 0 0 0 0
Building rental income 224 188 404 363
Gain (loss) related to contractual obligation investments 213 (473) 93 795
Foreign Currency Transaction Gain (Loss), before Tax (6,111) (396) (6,654) (456)
Nonoperating Income (Expense) (2,429) 613 (1,010) 3,724
Wheels India [Member]
       
Component of Other Income, Nonoperating [Line Items]        
Income (Loss) from Equity Method Investments $ 460 $ 0 $ 275 $ 0