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INVENTORIES (Details) (USD $)
12 Months Ended
Dec. 31, 2012
Dec. 31, 2011
Inventory Disclosure [Abstract]    
Raw material $ 153,308,000 $ 97,257,000
Work-in-process 69,030,000 31,141,000
Finished goods 154,785,000 75,137,000
Inventory, Gross 377,123,000 203,535,000
Adjustment to LIFO basis (10,738,000) (12,663,000)
Inventory, Net 366,385,000 190,872,000
Effect of LIFO Inventory Liquidation on Income $ 4,700,000