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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 |  |  |

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