LOANS PAYABLE AND SECURED LINE OF CREDIT - Interest (Details) - USD ($) $ in Thousands	3 Months Ended			6 Months Ended	9 Months Ended	12 Months Ended
	Sep. 30, 2021	Jun. 30, 2021	Mar. 31, 2021	Jun. 30, 2021	Sep. 30, 2021	Dec. 31, 2021	Dec. 31, 2020		Dec. 31, 2019
LOANS PAYABLE AND SECURED LINE OF CREDIT
Interest expense						$ 21,238	$ 17,174		$ 13,513
Interest capitalized						(13,314)	(15,577)		(13,333)
Interest income						(2)	(57)		(67)
Interest expense (income), net	$ 2,367	$ 1,772	$ 875	$ 2,647	$ 5,014	$ 7,922	$ 1,540	[1]	$ 113	[1]

[1] Amounts are revised. See Note 3 for more information.