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Debt
 6 Months Ended
Jun. 30, 2025
Debt Disclosure [Abstract]  
Debt Disclosure DEBT
 June 30, 2025December 31, 2024
In thousandsCurrentNon-CurrentCurrentNon-Current
2029 Senior Notes, net(1)
$— $290,425 $— $290,058 
Revolving Credit Facility(2)
— — — 195,000 
Finance lease obligations29,889 60,408 31,380 73,620 
$29,889 $350,833 $31,380 $558,678 
(1) Net of unamortized debt issuance costs of $2.7 million and $3.1 million at June 30, 2025 and December 31, 2024, respectively.
(2) Unamortized debt issuance costs of $2.7 million and $3.4 million at June 30, 2025 and December 31, 2024, respectively, included in Other Non-Current Assets.
2029 Senior Notes
In March 2021, the Company completed an offering of $375.0 million in aggregate principal amount of senior notes in a private placement conducted pursuant to Rule 144A and Regulation S under the Securities Act of 1933, as amended, for net proceeds of approximately $367.5 million (the “2029 Senior Notes”). For more details, please see Note 8 -- Debt contained in the 2024 10-K.
Revolving Credit Facility
At June 30, 2025, the Company had no outstanding draws, $20.2 million in outstanding letters of credit and $379.8 million available under the revolving credit facility (“RCF”). Future borrowing may be subject to certain financial covenants.
Finance Lease Obligations
From time to time, the Company acquires mining equipment and facilities under finance lease agreements. In the six months ended June 30, 2025, the Company entered into a new lease financing arrangement for mining equipment at Rochester for $0.8 million at an interest rate of 7.2%. All finance lease obligations are recorded, upon lease inception, at the present value of future minimum lease payments. For more details, please see Note 7 -- Leases in the 2024 10-K.
Interest Expense
 Three Months Ended June 30,Six Months Ended June 30,
In thousands2025202420252024
2029 Senior Notes$3,755 $3,755 $7,511 $7,575 
Revolving Credit Facility2,434 7,518 6,639 13,972 
Finance lease obligations1,561 997 3,219 2,256 
Amortization of debt issuance costs581 579 1,162 1,198 
Other obligations314 757 959 1,554 
Capitalized interest(394)(444)(789)(446)
Total interest expense, net of capitalized interest$8,251 $13,162 $18,701 $26,109