CASH FLOW DISCLOSURES AND NON CASH INVESTING AND FINANCING ACTIVITIES (Reconciliation of Cash) (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020	Sep. 30, 2020	Dec. 31, 2019
Supplemental Cash Flow Elements [Abstract]
Cash and cash equivalents	$ 71,244	$ 16,637	$ 13,139
Escrowed cash	12,497	6,970	7,124
Total cash, cash equivalents, and restricted cash shown in the consolidated statements of cash flows	$ 83,741	$ 23,607	$ 20,263	$ 36,985