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SHAREHOLDERS' EQUITY (Narrative) (Details) (USD $)
In Thousands, except Share data, unless otherwise specified
 12 Months Ended 1 Months Ended
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2010
Mar. 31, 2012
Ordinary Shares [Member]
Class of Stock [Line Items]        
Shares of stock issued       7,659,000
Proceeds from initial public offering       $ 84,200
Proceeds from offering after deducting underwriting discounts and commissions and offering expenses       75,422
Shares issued in exercise of option        999,000
Dividends paid 27,182 6,948 13,972  
Preferred stock dividend requirements 250,000 preferred shares entitle the holders thereof to a cumulative preference in all distributions of dividends by the Company up to an amount of (1) NIS 6,901 per annum linked to the consumer price index as of the closing date plus (2) 0.072% of the annual profit of the Company before tax and before payment of management fees      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Options granted 1,545,200       
Ordinary shares reserved for issuance 829,800      
Weighted-average grant-date fair value of options granted $ 5.14      
Unrecognized compensation cost 4,286      
Unrecognized compensation cost, weighted-average recognition period 1 year 6 months 15 days      
Compensation expenses $ 3,660