SEGMENT INFORMATION - Reconciliation (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
SEGMENT INFORMATION
Total segment gross profit	$ 89,632	$ 78,083
Costs and expenses
General and administrative expenses	8,931	6,932
Depreciation and amortization	125	94
Operating income	80,576	71,057
Fair value changes in equity securities	613	1,902
Interest and other income	975	733
Interest and other expense	(898)	(1,820)
Income before income taxes	$ 81,266	$ 71,872