OPERATING SEGMENTS (Details 2) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Segment assets	$ 979,870	$ 891,173
Investments in real estate partnerships	2,472	2,446
Other assets	60,907	55,605
Total assets	1,313,422	1,185,914
Total Segments [Member]
Segment assets	979,870	891,173	$ 844,019
Investments in real estate partnerships	2,472	2,446	5,243
Notes and interest receivable	70,166	79,308	69,551
Other assets	266,166	212,987	191,391
Total assets	$ 1,318,674	$ 1,185,914	$ 1,110,204