SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details 3) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Activities in the allowance for doubtful accounts
Accounts receivable from developers	$ 6,299	$ 9,633
Other	7,888	7,468
Total other receivables	14,187	17,101
Allowance for Doubtful Accounts
Activities in the allowance for doubtful accounts
Beginning Balance	757	773	$ 830
Provision for uncollectible accounts	1,664	1,703	1,570
Net write off of uncollectible accounts	(1,650)	(1,719)	(1,627)
Ending Balance	$ 771	$ 757	$ 773