Debt (Details Textual) - USD ($) $ in Thousands		1 Months Ended	6 Months Ended	12 Months Ended
	Feb. 21, 2024	Mar. 31, 2021	Dec. 31, 2025	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Debt Instrument [Line Items]
Finance Lease Obligations				$ 800
Financing cash flows from finance leases			$ 25,600	56,386	$ 24,524	$ 24,505
Decrease in finance lease liability				$ 55,300
Line of Credit
Debt Instrument [Line Items]
Stated interest rate			7.20%	7.20%
Revolving Credit Facility | Base Rate | Minimum
Debt Instrument [Line Items]
Debt Instrument, Basis Spread on Variable Rate				1.00%
Revolving Credit Facility | Base Rate | Maximum
Debt Instrument [Line Items]
Debt Instrument, Basis Spread on Variable Rate				1.75%
Revolving Credit Facility | London Interbank Offered Rate (LIBOR) 1 | Minimum
Debt Instrument [Line Items]
Debt Instrument, Basis Spread on Variable Rate				2.00%
Revolving Credit Facility | London Interbank Offered Rate (LIBOR) 1 | Maximum
Debt Instrument [Line Items]
Debt Instrument, Basis Spread on Variable Rate				2.75%
Senior Notes due 2029
Debt Instrument [Line Items]
Debt Instrument, Face Amount		$ 375,000
Proceeds from debt		$ 367,500
Stated interest rate			5.125%	5.125%
Revolving Credit Facility
Debt Instrument [Line Items]
Line of Credit Facility, Accordion Feature, Increase Limit	$ 100,000
Debt Covenant, Amount of Non-Capitalized Underground Mine Development Costs To Be Excluded from EBITDA	15,000
Letters of credit outstanding, amount			$ 500	$ 500
Revolving Credit Facility | Line of Credit
Debt Instrument [Line Items]
Amount available subject to debt covenants			$ 399,500	$ 399,500
Revolving Credit Facility | Credit Agreement | Line of Credit
Debt Instrument [Line Items]
Maximum borrowing capacity	$ 400,000