OTHER INVESTMENTS (Schedule of Receivables) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Schedule of Investments [Line Items]
Total other investments	$ 419,228	$ 504,626
Other Investment Note Due 2019 [Member]
Schedule of Investments [Line Items]
Other investments, gross		131,452
Maturity year	2019
Other Investment Note Due 2023 interest at 7.32 [Member]
Schedule of Investments [Line Items]
Other investments, gross	$ 65,000	65,000
Interest rate	7.32%
Maturity year	2023
Other Investment Note Due 2023 interest at 12.00 [Member]
Schedule of Investments [Line Items]
Other investments, gross	$ 52,213	59,454
Interest rate	12.00%
Maturity year	2023
Other Investment Note Due 2021 [Member]
Schedule of Investments [Line Items]
Other investments, gross	$ 77,087	71,036
Interest rate	13.09%
Maturity year	2021
Other Investment notes outstanding
Schedule of Investments [Line Items]
Other investments, gross	$ 166,241	131,397
Interest rate	8.38%
Maturity year	2029
Other Investment Note Due 2020 Through 2025 [Member]
Schedule of Investments [Line Items]
Other investments, gross	$ 58,687	$ 46,287
Interest rate	8.15%
Minimum | Other Investment Note Due 2020 Through 2025 [Member]
Schedule of Investments [Line Items]
Maturity year	2020
Maximum | Other Investment Note Due 2020 Through 2025 [Member]
Schedule of Investments [Line Items]
Maturity year	2025