SEGMENT INFORMATION - Reconciliation (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
SEGMENT INFORMATION
Total segment gross profit	$ 77,341	$ 93,271	$ 166,970	$ 171,354
Costs and expenses
General and administrative expenses	9,312	7,212	18,243	14,143
Depreciation and amortization	124	92	246	186
Operating income	67,905	85,967	148,481	157,025
Fair value changes in equity securities	(2,191)	1,957	(1,577)	3,859
Interest and other income	1,118	676	2,093	1,409
Interest and other expense	(1,398)	(1,145)	(2,296)	(2,965)
Income before income taxes	$ 65,434	$ 87,455	$ 146,701	$ 159,328