INCOME TAXES - Effective Income Tax Rate Reconciliation (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Amount
Income taxes at statutory rates	$ 120,512	$ 89,479	$ 59,249
State income taxes, net of federal benefit	429	914	625
Additional recoverable basis	(16,300)
GILTI & subpart F, net of foreign tax credits	15,576	22,087	7,235
Foreign tax credits	(10,944)	(16,166)	(8,598)
Excess depletion	(2,548)	(2,473)	(2,259)
Statutory tax attributes to non-controlling interest	(1,044)	(74)	(118)
Other	(63)
Other		884	1,421
Non-deductible acquisition cost	1,615	0	0
Total income tax expense	$ 102,290	$ 93,613	$ 42,008
Rate
Income taxes at statutory rates	21.00%	21.00%	21.00%
State income taxes, net of federal benefit	0.10%	0.20%	0.20%
GILTI & subpart F, net of foreign tax credits	2.70%	5.20%	2.60%
Foreign tax credits	(1.90%)	(3.80%)	(3.10%)
Excess depletion	(0.40%)	(0.60%)	(0.80%)
Excess depletion	(0.20%)	0.00%	0.00%
Other	0.00%
Other		0.20%	0.50%
Non-deductible acquisition cost	0.30%	0.00%	0.00%
Total income tax expense	17.80%	22.00%	14.90%
Canada
Amount
Withholding tax less foreign tax credits	$ 7,619	$ 0	$ (92)
Change in valuation allowance	6,816	0	0
Non taxable income and expenses	7,979	(16)	22
Other	$ 731	$ 1,382	$ 397
Rate
Withholding tax less foreign tax credits	1.30%	0.00%	0.00%
Change in valuation allowance	1.20%	0.00%	0.00%
Non taxable income and expenses	1.40%	0.00%	0.00%
Other	0.10%	0.30%	0.10%
Switzerland
Amount
Change in valuation allowance	$ 0	$ 0	$ (8,462)
Other	2,247	1,298	(1,024)
Statutory tax rate differential - federal	(58,136)	(37,273)	(27,491)
Cantonal taxes	19,675	13,216	9,504
Additional recoverable basis	$ (16,264)	$ 0	$ 0
Rate
Change in valuation allowance	0.00%	0.00%	(3.00%)
Other	0.40%	0.30%	(0.40%)
Statutory tax rate differential - federal	(10.10%)	(8.80%)	(9.70%)
Cantonal taxes	3.40%	3.10%	3.40%
Additional recoverable basis	(2.80%)	0.00%	0.00%
Mexico
Amount
Withholding taxes, net of refund	$ 11,893	$ 15,656	$ 8,125
Rate
Withholding taxes, net of refund	2.10%	3.70%	2.90%
Other foreign jurisdictions
Amount
Statutory tax rate differential - federal	$ 315	$ 826	$ 293
Rate
Statutory tax rate differential - federal	0.10%	0.20%	0.10%
United States
Amount
Change in valuation allowance	$ (4,118)	$ 3,873	$ 3,180
Rate
Change in valuation allowance	(0.70%)	0.90%	1.10%