Condensed Consolidated Statements of Operations - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
REVENUES:
Revenue from customers	$ 24,014,000	$ 12,046,000	$ 32,947,000	$ 24,821,000
Revenues	24,307,000	12,387,000	33,527,000	25,460,000
COSTS AND EXPENSES:
Selling, general, and administrative	16,312,000	25,993,000	40,938,000	51,766,000
Total costs and expenses	34,288,000	34,671,000	66,910,000	69,961,000
OTHER INCOME:
Interest income	226,000	2,316,000	1,232,000	4,770,000
Gain on settlement of contingent consideration—related party	0	0	0	64,870,000
Miscellaneous	88,000	9,000	176,000	19,000
Total other income	314,000	2,325,000	1,408,000	69,659,000
EQUITY IN EARNINGS (LOSS) FROM UNCONSOLIDATED ENTITIES	23,905,000	(2,669,000)	(7,006,000)	6,213,000
INCOME (LOSS) BEFORE INCOME TAX (PROVISION) BENEFIT	14,238,000	(22,628,000)	(38,981,000)	31,371,000
INCOME TAX (PROVISION) BENEFIT	0	0	0	(1,266,000)
NET INCOME (LOSS)	14,238,000	(22,628,000)	(38,981,000)	30,105,000
LESS NET INCOME (LOSS) ATTRIBUTABLE TO NONCONTROLLING INTERESTS	7,606,000	(12,116,000)	(20,807,000)	16,809,000
NET INCOME (LOSS) ATTRIBUTABLE TO THE COMPANY	$ 6,632,000	$ (10,512,000)	$ (18,174,000)	$ 13,296,000
Common Class A
NET INCOME (LOSS) ATTRIBUTABLE TO THE COMPANY PER CLASS A SHARE
Basic (in dollars per share)	$ 0.10	$ (0.16)	$ (0.27)	$ 0.19
Diluted (in dollar per share)	$ 0.10	$ (0.16)	$ (0.27)	$ 0.18
WEIGHTED AVERAGE SHARES OUTSTANDING
Basic (in shares)	66,731,233	66,256,961	66,690,550	66,234,066
Diluted (in shares)	142,851,412	66,256,961	68,854,356	145,403,189
Common Class B
NET INCOME (LOSS) ATTRIBUTABLE TO THE COMPANY PER CLASS A SHARE
Basic (in dollars per share)	$ 0.00	$ (0.00)	$ (0.00)	$ 0.00
Diluted (in dollar per share)	$ 0.00	$ (0.00)	$ (0.00)	$ 0.00
WEIGHTED AVERAGE SHARES OUTSTANDING
Basic (in shares)	79,233,544	79,275,234	79,233,544	79,169,124
Diluted (in shares)	79,233,544	79,275,234	79,233,544	79,275,824
NET INCOME (LOSS) ATTRIBUTABLE TO THE COMPANY PER CLASS B SHARE
Basic and diluted (in dollars per share)	$ 0.00	$ (0.00)	$ (0.00)	$ 0.00
Land sales
REVENUES:
Revenue from customers	$ 17,028,000	$ 10,000	$ 17,034,000	$ 65,000
COSTS AND EXPENSES:
Cost and expenses	11,861,000	0	11,861,000	0
Land sales | Affiliated Entity
REVENUES:
Revenue from customers	2,000	236,000	12,000	466,000
Management services—related party
COSTS AND EXPENSES:
Cost and expenses	4,416,000	7,479,000	10,467,000	15,095,000
Management services—related party | Affiliated Entity
REVENUES:
Revenue from customers	6,314,000	11,168,000	14,558,000	22,231,000
Operating properties
REVENUES:
Revenue from customers	670,000	632,000	1,343,000	2,059,000
Revenues	963,000	973,000	1,923,000	2,698,000
COSTS AND EXPENSES:
Cost and expenses	$ 1,699,000	$ 1,199,000	$ 3,644,000	$ 3,100,000