SEGMENT INFORMATION - Reconciliation (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Segment Reporting [Abstract]
Total segment gross profit	$ 471,174	$ 343,394	$ 323,101
Costs and expenses
General and administrative expenses	40,934	39,761	34,612
Depreciation and amortization	341	431	493
Impairment of royalty interests	0	0	4,287
Operating income	429,899	303,202	283,709
Fair value changes in equity securities	(66)	(147)	(1,503)
Interest and other income	6,008	9,952	7,832
Interest and other expense	(9,749)	(30,867)	(17,170)
Income before income taxes	$ 426,092	$ 282,140	$ 272,868