INCOME TAXES - Reconciliation of Tax Rate for TRS and Total Provision for TRS and Operating Partnership (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Reconciliation of the federal statutory rate to the effective income tax rate for the TRSs
Statutory federal income tax provision	$ (31,052)	$ 17,608	$ 18,943
Nontaxable income of the REITs	19,963	(16,996)	(19,073)
State income taxes, net of federal tax benefit	(3,079)	568	266
Provision to return and deferred adjustment	(16)	(6)	75
Effect of permanent differences and other	319	326	(184)
Tax benefit from deduction for partnership distributions	0	0	(949)
Change in valuation allowance	15,241	0	0
Income tax expense (benefit)	$ 1,376	$ 1,500	$ (922)