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SHAREHOLDERS' EQUITY (Details) - USD ($) $ / shares in Units, $ in Thousands | 12 Months Ended
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Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
Return of capital distribution | $ 3,059 | $ 2,986 | $ 1,503
Share repurchase program (in shares) | 0 |  |
Share repurchase program |  | $ 582 | 1,769
Common Stock |  |  |
Annual return of capital declared (in dollars per share) | $ 0.01 | $ 0.010 |
Return of capital distribution | $ 3,059 | $ 2,986 | $ 1,503
Share repurchase program (in shares) |  | 558 | 1,896
Share repurchase program |  | $ 582 | $ 1,769

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