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EARNINGS PER SHARE (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2015 | Sep. 30, 2014 | Sep. 30, 2015 | Sep. 30, 2014
Numerator [Abstract] |  |  |  |  |  |
Net earnings | $ 4,920 | $ 1,261 | [1] | $ 16,302 | $ 6,829 | [1]
Undistributed earnings | 4,109 | 451 |  | 13,870 | 4,452 |
Undistributed earnings allocation - basic and diluted [Abstract] |  |  |  |  |  |
Total undistributed earnings | 4,109 | 451 |  | 13,870 | 4,452 |
Net earnings allocation - basic and diluted [Abstract] |  |  |  |  |  |
Net earnings | 4,920 | 1,261 | [1] | 16,302 | 6,829 | [1]
Class A [Member] |  |  |  |  |  |
Numerator [Abstract] |  |  |  |  |  |
Net earnings | 852 | 211 |  | 2,833 | 1,193 |
Less Dividends declared: | 130 | 131 |  | 391 | 391 |
Undistributed earnings allocation - basic and diluted [Abstract] |  |  |  |  |  |
Total undistributed earnings | 722 | 80 |  | 2,442 | 802 |
Net earnings allocation - basic and diluted [Abstract] |  |  |  |  |  |
Net earnings | $ 852 | $ 211 |  | $ 2,833 | $ 1,193 |
Weighted-average shares outstanding [Abstract] |  |  |  |  |  |
Common share - basic and diluted (in shares) | 2,175 | 2,175 | [1] | 2,175 | 2,175 | [1]
Net earnings per share [Abstract] |  |  |  |  |  |
Common share - basic and diluted (in dollars per share) | $ 0.39 | $ 0.10 | [1] | $ 1.30 | $ 0.55 | [1]
Class B [Member] |  |  |  |  |  |
Numerator [Abstract] |  |  |  |  |  |
Net earnings | $ 4,068 | $ 1,050 |  | $ 13,469 | $ 5,636 |
Less Dividends declared: | 681 | 679 |  | 2,041 | 1,986 |
Undistributed earnings allocation - basic and diluted [Abstract] |  |  |  |  |  |
Total undistributed earnings | 3,387 | 371 |  | 11,428 | 3,650 |
Net earnings allocation - basic and diluted [Abstract] |  |  |  |  |  |
Net earnings | $ 4,068 | $ 1,050 |  | $ 13,469 | $ 5,636 |
Weighted-average shares outstanding [Abstract] |  |  |  |  |  |
Common share - basic and diluted (in shares) | 9,719 | 9,591 | [1] | 9,694 | 9,420 | [1]
Net earnings per share [Abstract] |  |  |  |  |  |
Common share - basic and diluted (in dollars per share) | $ 0.42 | $ 0.11 | [1] | $ 1.39 | $ 0.60 | [1]
[1] | (Revised)

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