BUSINESS SEGMENTS - Reconciling Information Between Reportable Segments and Consolidated Totals (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Segment Reporting [Abstract]
Total segment gross profit (loss)	$ 272,619	$ 264,018	$ 268,824
Less operating expenses:
Research and development expenses	6,501	7,215	5,078
Selling and marketing expenses	17,694	18,306	16,193
General and administrative expenses	80,119	68,179	61,274
Other operating income	(9,375)	0	0
Impairment of long-lived assets	1,280	0	32,648
Write-off of unsuccessful exploration activities	3,930	3,733	828
Operating income	172,470	166,585	152,803
Interest income	7,883	11,983	3,417
Interest expense, net	(134,031)	(98,881)	(87,743)
Derivatives and foreign currency transaction gains (losses)	(4,187)	(3,278)	(6,044)
Income attributable to sale of tax benefits	73,054	61,157	33,885
Other non-operating income (expense), net	188	1,519	(709)
Income from operations before income tax and equity in earnings (losses) of investees	$ 115,377	$ 139,085	$ 95,609