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MAJOR CUSTOMER AND GEOGRAPHIC INFORMATION (Schedule of Revenues) (Details) (USD $)
In Thousands, unless otherwise specified
 12 Months Ended
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2010
Revenues from External Customers and Long-Lived Assets [Line Items]      
Revenues $ 296,564 $ 259,671 $ 198,791
Australia [Member]
      
Revenues from External Customers and Long-Lived Assets [Line Items]      
Revenues 88,935 88,229 82,327
United States [Member]
      
Revenues from External Customers and Long-Lived Assets [Line Items]      
Revenues 86,759 59,735 30,916
Canada [Member]
      
Revenues from External Customers and Long-Lived Assets [Line Items]      
Revenues 40,322 29,695 13,668
Israel [Member]
      
Revenues from External Customers and Long-Lived Assets [Line Items]      
Revenues 36,373 38,592 31,707
Europe [Member]
      
Revenues from External Customers and Long-Lived Assets [Line Items]      
Revenues 20,749 22,880 24,022
Rest of World [Member]
      
Revenues from External Customers and Long-Lived Assets [Line Items]      
Revenues $ 23,426 $ 20,540 $ 16,151