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)