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EQUITY - Assumptions for calculation of fair value of stock options (Details 1) (Stock Options)
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12 Months Ended | ||
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Dec. 31, 2014
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Dec. 31, 2013
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Dec. 31, 2012
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| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | |||
| Risk -free interest rate | 0.91% | ||
| Average expected term (years) | 3 years | 3 years | 3 years |
| Dividend yield | 1.91% | 2.40% | 1.62% |
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Minimum
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| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | |||
| Risk -free interest rate | 0.40% | 0.55% | |
| Expected volatility | 44.90% | 44.90% | 57.73% |
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Maximum
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| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | |||
| Risk -free interest rate | 0.75% | 0.162% | |
| Expected volatility | 52.82% | 63.48% | 68.65% |