Fair Value Measurements (Tables)

12 Months Ended

Dec. 31, 2022

Dec. 31, 2021

Fair Value Disclosures [Abstract]

Schedule of Fair Value Adjustments to Comprehensive income (Loss)

	Year Ended December 31,
In thousands	2022		2021		2020
Change in the value of equity securities(1)	$	(63,529)	$	(10,476)	$	7,601
Exchange agreement embedded derivative	—		9,933		—
Termination of gold zero cost collars	(3,139)		—		—
Fair value adjustments, net	$	(66,668)	$	(543)	$	7,601

(1) Includes unrealized losses on held equity securities of $47.9 million, $10.4 million, and $16.2 million for the years ended December 31, 2022, 2021 and 2020, respectively.

Financial assets and liabilities measured at fair value on recurring basis

The following table presents the Company’s financial assets and liabilities measured at fair value on a recurring basis (at least annually) by level within the fair value hierarchy. Assets and liabilities are classified in their entirety based on the lowest level of input that is significant to the fair value measurement:

	Fair Value at December 31, 2022
In thousands	Total		Level 1		Level 2		Level 3
Assets:
Equity securities including warrants	$	44,152	$	43,893	$	259	$	—
Provisional metal sales contracts	299		—		299		—
Gold forwards	12,343		—		12,343		—
	$	56,794	$	43,893	$	12,901	$	—
Liabilities:
Provisional metal sales contracts	$	10	$	—	$	10	$	—

	Fair Value at December 31, 2021
In thousands	Total		Level 1		Level 2		Level 3
Assets:
Equity securities	$	132,197	$	132,197	$	—	$	—
Provisional metal sales contracts	86		—		86		—
	$	132,283	$	132,197	$	86	$	—
Liabilities:
Gold zero cost collars	$	1,212	$	—	$	1,212	$	—
Provisional metal sales contracts	162		—		162		—
	$	1,374	$	—	$	1,374	$	—

Changes in the fair value of the Company's Level 3 financial liabilities

The following tables present the changes in the fair value of the Company's Level 3 financial assets and liabilities in the year ended December 31, 2021.

	December 31, 2021
In thousands	Balance at the beginning of the period		Initial valuation		Revaluation		Settlements		Balance at the end of the period
Liabilities:
Exchange agreement embedded derivative	$	—	$	9,933	$	(9,933)	$	—	$	—

Financial Assets and Liabilities not Measured at Fair Value

The fair value of financial assets and liabilities carried at book value in the financial statements at December 31, 2022 and December 31, 2021 is presented in the following table:

	December 31, 2022
In thousands	Book Value		Fair Value		Level 1		Level 2		Level 3
Assets:
Promissory note	$	4,926	$	4,579	$	—	$	4,579	$	—
Deferred cash consideration	$	7,677	$	7,317	$	—	$	7,317	$	—
Liabilities:
2029 Senior Notes(1)	$	369,212	$	291,924	$	—	$	291,924	$	—
Revolving Credit Facility(2)	$	80,000	$	80,000	$	—	$	80,000	$	—

(1) Net of unamortized debt issuance costs of $5.8 million

(2) Unamortized debt issuance costs of $3.6 million included in Other Non-Current Assets.

	December 31, 2021
In thousands	Book Value		Fair Value		Level 1		Level 2		Level 3
Liabilities:
2029 Senior Notes(1)	$	368,273	$	337,384	$	—	$	337,384	$	—
Revolving Credit Facility(2)	$	65,000	$	65,000	$	—	$	65,000	$	—

(1) Net of unamortized debt issuance costs of $6.7 million.

(2) Unamortized debt issuance costs of $2.4 million included in Other Non-Current Assets.