Note 15 - Properties, Plants, Equipment and Mineral Interests, and Lease Commitments (Tables)

12 Months Ended

Dec. 31, 2023

Property, Plant and Equipment [Abstract]

Schedule of properties, plants, equipment, and mineral interests

	December 31,
	2023		2022
Mining properties, including asset retirement obligations	$	911,018	$	871,027
Development costs		630,391		588,298
Plants and equipment		1,666,577		1,514,906
Land		35,112		35,644
Mineral interests		1,164,390		1,171,261
Construction in progress		121,022		134,600
		4,528,510		4,315,736
Less accumulated depreciation, depletion and amortization		1,862,260		1,745,946
Net carrying value	$	2,666,250	$	2,569,790