RESTATEMENT OF PREVIOUSLY ISSUED FINANCIAL STATEMENTS - Impact of Restatement Adjustments on Consolidated Cash Flows Statements (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
CASH FLOWS FROM OPERATING ACTIVITIES:
Net income	$ 159	$ 5,990
Reconciliation of net income (loss) to net cash provided by operating activities:
Deferred income taxes	580	941
Changes in operating assets and liabilities:
Changes in operating assets and liabilities	1,333	(15,981)
Net cash provided by (used in) operating activities	8,577	(1,612)
As previously reported
CASH FLOWS FROM OPERATING ACTIVITIES:
Net income	128	5,648
Reconciliation of net income (loss) to net cash provided by operating activities:
Deferred income taxes	459	928
Changes in operating assets and liabilities:
Changes in operating assets and liabilities	3,460	(15,626)
Net cash provided by (used in) operating activities	10,552	(1,612)
Adjustments
CASH FLOWS FROM OPERATING ACTIVITIES:
Net income	31	342
Reconciliation of net income (loss) to net cash provided by operating activities:
Deferred income taxes	121	13
Changes in operating assets and liabilities:
Changes in operating assets and liabilities	(2,127)	(355)
Net cash provided by (used in) operating activities	$ (1,975)	$ 0