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NON-CONTROLLING INTEREST: (Details) (USD $)
 3 Months Ended
Mar. 31, 2012
Mar. 31, 2011
Non-controlling interest activity    
Balance at the beginning of the period $ 20,979,000 $ 20,000,000
Net earnings 2,132,000 1,771,000
Dividend paid (472,000) (2,193,000)
Other   (100,000)
Balance at the end of the period $ 22,608,000 $ 19,500,000