ORGANIZATION AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details) - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017	Mar. 31, 2017
Organization And Summary Of Significant Accounting Policies Details
Cash and cash equivalents	$ 40,894	$ 42,705	$ 55,282
Restricted cash (cash held in escrow and under the terms of secured notes and unsecured bonds)	55,400	$ 45,637	31,045
Total cash and cash equivalents, and restricted cash	$ 96,294		$ 86,327