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PRODUCT WARRANTY COSTS (Details) (USD $)
In Thousands, unless otherwise specified
12 Months Ended
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2010
Changes in the carrying amount of product warranty accruals      
Balance at beginning of year $ 15,781 $ 16,879 $ 16,768
Accruals for warranties 10,872 10,395 11,406
Settlements (11,477) (11,260) (11,065)
Foreign currency translation 128 (233) (230)
Balance at end of year $ 15,304 $ 15,781 $ 16,879