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INVENTORIES (Details) (USD $)
In Thousands, unless otherwise specified
Mar. 31, 2015
Dec. 31, 2014
Components of inventories [Abstract]    
Raw materials $ 52,113us-gaap_InventoryRawMaterialsNetOfReserves $ 51,638us-gaap_InventoryRawMaterialsNetOfReserves
Work in progress 16,809us-gaap_InventoryWorkInProcessNetOfReserves 16,128us-gaap_InventoryWorkInProcessNetOfReserves
Finished goods 42,986us-gaap_InventoryFinishedGoodsNetOfReserves 45,864us-gaap_InventoryFinishedGoodsNetOfReserves
Inventories $ 111,908us-gaap_InventoryNet $ 113,630us-gaap_InventoryNet