Note 13 - Properties, Plants, Equipment and Mineral Interests, and Lease Commitments (Tables)

12 Months Ended

Dec. 31, 2022

Property, Plant and Equipment [Abstract]

Schedule of properties, plants, equipment, and mineral interests

	December 31,
	2022		2021
Mining properties, including asset retirement obligations	$	871,027	$	818,582
Development costs		588,298		549,666
Plants and equipment		1,514,906		1,446,183
Land		35,644		34,931
Mineral interests		1,171,261		972,754
Construction in progress		134,600		86,903
		4,315,736		3,909,019
Less accumulated depreciation, depletion and amortization		1,745,946		1,598,209
Net carrying value	$	2,569,790	$	2,310,810