INCOME TAXES - Deferred Taxes (Details) - USD ($)	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Reconciliation of the income tax computed at federal statutory rates to the income tax provision reported
Income from continuing operations before income taxes for TRSs	$ 346,403,000	$ 2,067,000	$ 381,134,000
Income tax provision	882,000	925,000	1,376,000
Deferred tax liabilities:
Reserve for uncertain tax positions	0	0
TRS
Reconciliation of the income tax computed at federal statutory rates to the income tax provision reported
Income from continuing operations before income taxes for TRSs	4,414,000	4,962,000	4,878,000
Expected federal income tax provision	927,000	1,042,000	1,658,000
State income taxes	21,000	35,000	27,000
Change in valuation allowance	0	0	(37,000)
Other	(66,000)	(152,000)	(272,000)
Income tax provision	882,000	925,000	$ 1,376,000
Deferred tax assets:
Net operating losses	39,000	37,000
Secured borrowings—government guaranteed loans	132,000	198,000
Other	166,000	185,000
Total gross deferred tax assets	337,000	420,000
Valuation allowance	(38,000)	(38,000)
Deferred tax asset, net of valuation allowance	299,000	382,000
Deferred tax liabilities:
Loans receivable	(210,000)	(255,000)
Deferred tax liabilities	(210,000)	(255,000)
Deferred tax asset, net	$ 89,000	$ 127,000