INCOME TAXES (Details) - USD ($) $ in Thousands					12 Months Ended
	Mar. 27, 2020	Dec. 31, 2018	Jan. 01, 2018	Dec. 31, 2017	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
INCOME TAXES
Effective Income tax (as percent)					0.40%	32.00%	3.00%
Statutory tax rate (as a percent)			21.00%	35.00%	21.00%	21.00%	21.00%
Tax benefit (expense)	$ 500	$ 600			$ (1,476)	$ 1,949	$ 1,704
Current tax (benefit) expense
Federal income tax (benefit) expense					(941)	696	1,073
State and local income tax (benefit) expense					(439)	1,034	1,077
Total current (benefit) expense					(1,380)	1,730	2,150
Deferred tax (benefit) expense
Federal income tax (benefit) expense					(105)	49	(20)
State and local income tax expense (benefit)					9	170	(426)
Total deferred (benefit) expense					(96)	219	(446)
Total income tax (benefit) expense	500	600			(1,476)	1,949	1,704
Tax (benefit) expense attributable to controlling interests					(1,246)	1,488	1,425
Income tax (benefit) expense attributable to noncontrolling interests					(230)	461	279
Provision calculated at federal statutory income tax rate:
(Loss) income before taxes					$ (403,208)	$ 6,085	$ 56,003
Statutory rate			21.00%	35.00%	21.00%	21.00%	21.00%
Income tax (benefit) expense computed at statutory rate					$ (84,674)	$ 1,278	$ 11,761
Less: noncontrolling interests					13,272	(284)	(3,735)
Income tax (benefit) expense attributable to controlling interests					(71,402)	994	8,026
State and local income taxes, net of federal benefit					(430)	884	515
Change in subsidiary tax status					(409)	587
CARES Act NOL carryback benefit					(459)
Change in valuation allowance					71,454	(1,833)	(7,696)
Deferred adjustment due to restructuring						856
Other							580
Income tax (benefit) expense attributable to controlling interests					(1,246)	1,488	1,425
Income tax (benefit) expense attributable to noncontrolling interests					(230)	461	279
Total income tax (benefit) expense	$ 500	$ 600			$ (1,476)	$ 1,949	$ 1,704