OTHER INVESTMENTS (Details) - USD ($) $ in Thousands	Sep. 30, 2015	Dec. 31, 2014
Schedule of Investments [Line Items]
Notes receivable, gross	$ 84,684	$ 48,952
Allowance for loss on notes receivable
Total other investments	$ 84,684	$ 48,952
Other investment note due 2014
Schedule of Investments [Line Items]
Notes receivable, gross		$ 1,640
Other investment note due 2015; interest at 6.50%
Schedule of Investments [Line Items]
Notes receivable, gross	$ 495
Interest rate	6.50%	6.50%
Other investment notes due 2015; interest at 9.50%
Schedule of Investments [Line Items]
Notes receivable, gross	$ 75	$ 891
Interest rate	9.50%	9.50%
Other investment notes due 2015; interest at 10.00%
Schedule of Investments [Line Items]
Notes receivable, gross	$ 5,439	$ 5,439
Interest rate	10.00%	10.00%
Other investment note due 2016; interest at 7.25%
Schedule of Investments [Line Items]
Notes receivable, gross	$ 739
Interest rate	7.25%	7.25%
Other investment note due 2016; interest at 10.00%
Schedule of Investments [Line Items]
Notes receivable, gross	$ 23
Interest rate	10.00%	10.00%
Other investment notes due 2017; interest at 10.00%
Schedule of Investments [Line Items]
Notes receivable, gross	$ 21,925	$ 24,800
Interest rate	10.00%	10.00%
Other investment note due 2018; interest at 10.00%
Schedule of Investments [Line Items]
Notes receivable, gross	$ 167
Interest rate	10.00%	10.00%
Other investment note due 2018; interest at 11.00%
Schedule of Investments [Line Items]
Notes receivable, gross	$ 1,013
Interest rate	11.00%	11.00%
Other investment note due 2018; interest at 12.00%
Schedule of Investments [Line Items]
Notes receivable, gross	$ 1,024
Interest rate	12.00%	12.00%
Other investment note due 2020; interest at 7.50%
Schedule of Investments [Line Items]
Notes receivable, gross	$ 4,723
Interest rate	7.50%	7.50%
Other investment note due 2020; interest at 8.00%
Schedule of Investments [Line Items]
Notes receivable, gross	$ 4,610
Interest rate	8.00%	8.00%
Other investment note due 2021; interest at 7.00%
Schedule of Investments [Line Items]
Notes receivable, gross	$ 75
Interest rate	7.00%	7.00%
Other investment note due 2021; interest at 11.04%
Schedule of Investments [Line Items]
Notes receivable, gross	$ 961	$ 1,053
Interest rate	11.04%	11.04%
Other investment note due 2022; interest at 10.77%
Schedule of Investments [Line Items]
Notes receivable, gross	$ 1,977	$ 2,110
Interest rate	10.77%	10.77%
Other investment notes due 2022; interest at 11.04%
Schedule of Investments [Line Items]
Notes receivable, gross	$ 3,789	$ 4,062
Interest rate	11.04%	11.04%
Other investment note due 2023; interest at 9.00%
Schedule of Investments [Line Items]
Notes receivable, gross	$ 5,468
Interest rate	9.00%	9.00%
Other investment note due 2023; interest at 10.00%
Schedule of Investments [Line Items]
Notes receivable, gross	$ 1,000	$ 1,000
Interest rate	10.00%	10.00%
Other investment notes due 2023; interest at 10.25%
Schedule of Investments [Line Items]
Notes receivable, gross	$ 1,392
Interest rate	10.25%	10.25%
Other investment notes due 2023; interest at 10.51%
Schedule of Investments [Line Items]
Notes receivable, gross	$ 2,900	$ 1,942
Interest rate	10.51%	10.51%
Other investment notes due 2023; interest at 10.77%
Schedule of Investments [Line Items]
Notes receivable, gross	$ 7,039	$ 5,705
Interest rate	10.77%	10.77%
Other investment notes due 2023; interest at 11.04%
Schedule of Investments [Line Items]
Notes receivable, gross	$ 292	$ 310
Interest rate	11.04%	11.04%
Other investment note due 2030; interest at 6.66%
Schedule of Investments [Line Items]
Notes receivable, gross	$ 19,558
Interest rate	6.66%	6.66%