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STOCKHOLDERS' EQUITY (Treasury Stock) (Details) - USD ($) $ in Thousands | 6 Months Ended |
--- | --- | ---
Jun. 30, 2017 | Jun. 30, 2016 | Dec. 31, 2016
Treasury Stock |  |  |
Aggregate cost of shares repurchased during the period | $ 3,611 | $ 5,116 |
Stock Repurchase Program |  |  |
Treasury Stock |  |  |
Amount available for repurchase | $ 34,100 |  | $ 37,700
Number of shares repurchased during the period | 194,520 |  |
Aggregate cost of shares repurchased during the period | $ 3,600 |  |

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