Pay vs Performance Disclosure - USD ($)

12 Months Ended

Dec. 31, 2024

Dec. 31, 2023

Dec. 31, 2022

Dec. 31, 2021

Dec. 31, 2020

Pay vs Performance Disclosure

Pay vs Performance Disclosure, Table

	Pay-versus-Performance Table

The following table sets forth additional compensation information of our CEO (sometimes referred to as “PEO” for purposes of this section) and our other NEOs along with TSR, net income, and adjusted EBITDA performance results for our fiscal years ended 2024, 2023, 2022, 2021 and 2020. The calculations and analysis below do not necessarily reflect the Company’s approach to aligning executive compensation with performance. For information concerning the Company’s compensation philosophy and how the Company aligns executive compensation with Company performance, refer to the CD&A beginning on page 60.

																Value of Initial Fixed $100 Investment Based On:
	Year (a)			Summary Compensation Table Total for PEO(1) (b)			Compensation Actually Paid to PEO(2) (c)			Average Summary Compensation Table Total for non-PEO NEOs(3) (d)			Average Compensation Actually Paid to non- PEO NEOs(2)(3) (e)			Total Stockholder Return(4) (f)			Peer Group Total Stockholder Return(4) (g)			Net Income (h)			Adjusted EBITDA (Company Selected Measure)(5) (i)
	2024			$4,387,806			$9,841,535			$1,837,740			$3,866,999			$71			$125			$58,900,000			$339,152,000
	2023			$4,108,972			$3,852,029			$1,722,556			$1,595,045			$40			$113			($103,612,000)			$142,302,000
	2022			$3,905,654			$2,406,554			$1,558,682			$1,028,030			$42			$102			($78,107,000)			$138,954,000
	2021			$3,703,859			$2,672,360			$1,479,751			$1,177,195			$62			$112			($31,322,000)			$216,112,000
	2020			$4,078,908			$6,765,818			$1,546,507			$2,652,357			$128			$124			$25,627,000			$263,565,000

1.
In all the years in question, Mitchell J. Krebs was our Chief Executive Officer.

2.
The following tables set forth the adjustments made during 2024 represented in the PVP table to arrive at CAP to our PEO and average CAP to our other NEOs. The equity award adjustments to arrive at “Compensation Actually Paid” or “CAP” were calculated consistent with FASB ASC 718, and the valuation assumptions used to calculate fair values did not materially differ from those disclosed at the time of grant. For information on our adjustments made during 2020-2023, refer to our 2024 Proxy Statement.

							PEO			Average Non-PEO
	Total Reported in 2024 Summary Compensation Table (SCT)						$4,387,806			$1,837,740
				Less, value of Stock Awards reported in SCT			$2,334,161			$885,893
				Plus, Year-End Fair Value of Awards Granted in the Fiscal Year that are Unvested and Outstanding			$5,542,109			$2,103,417
				Plus, Change in Fair Value of Prior Year Awards that are Outstanding and Unvested			$2,231,285			$809,087
				Plus, FMV of Awards Granted this Year and that Vested this Year			—			—
				Plus, Change in Fair Value (from prior year-end to vesting date) of Prior Year Awards that Vested during the Fiscal Year			$14,496			$2,648
				Less, Prior Year Fair Value of Prior Year Awards that Failed to Vest this Year			—			—
	Total Adjustments						$5,453,729			$2,029,259
	Compensation Actually Paid for 2024						$9,841,535			$3,866,999

3.
During each of 2024, 2023 and 2022, our non-PEO NEOs consisted of Thomas S. Whelan, Michael Routledge, Casey M. Nault and Emilie C. Schouten. During 2021, our non-PEO NEOs consisted of Thomas S. Whelan, Michael Routledge, Casey M. Nault, Terrence F. Smith, and Hans J. Rasmussen. During 2020, our non-PEO NEOs consisted of Thomas S. Whelan, Michael Routledge, Casey M. Nault and Hans J. Rasmussen. Mr. Smith departed the Company effective August 27, 2021, and Mr. Rasmussen retired from his position as Senior Vice President, Exploration, effective March 31, 2022.

4.
Company and peer group TSR reflects the Company’s “TSR peer group” as reflected in our 2024 Annual Report on Form 10-K pursuant to Item 201(e) of Regulation S-K. Each year reflects what the cumulative value of $100 would be, including reinvestment of dividends, if such amount were invested on December 31, 2024.

5.
Adjusted EBITDA, a non-GAAP financial reporting measure, is used by the Company to evaluate operating performance of our core mining business and allows investors and analysts to compare results of the Company to similar results of other mining companies. For a reconciliation of Adjusted EBITDA to net income, please refer to the tables in Appendix A.

Company Selected Measure Name

Adjusted EBITDA

Named Executive Officers, Footnote

1.
In all the years in question, Mitchell J. Krebs was our Chief Executive Officer.

3.
During each of 2024, 2023 and 2022, our non-PEO NEOs consisted of Thomas S. Whelan, Michael Routledge, Casey M. Nault and Emilie C. Schouten. During 2021, our non-PEO NEOs consisted of Thomas S. Whelan, Michael Routledge, Casey M. Nault, Terrence F. Smith, and Hans J. Rasmussen. During 2020, our non-PEO NEOs consisted of Thomas S. Whelan, Michael Routledge, Casey M. Nault and Hans J. Rasmussen. Mr. Smith departed the Company effective August 27, 2021, and Mr. Rasmussen retired from his position as Senior Vice President, Exploration, effective March 31, 2022.

Peer Group Issuers, Footnote

4.
Company and peer group TSR reflects the Company’s “TSR peer group” as reflected in our 2024 Annual Report on Form 10-K pursuant to Item 201(e) of Regulation S-K. Each year reflects what the cumulative value of $100 would be, including reinvestment of dividends, if such amount were invested on December 31, 2024.

PEO Total Compensation Amount

$ 4,387,806

$ 4,108,972

$ 3,905,654

$ 3,703,859

$ 4,078,908

PEO Actually Paid Compensation Amount

$ 9,841,535

3,852,029

2,406,554

2,672,360

6,765,818

Adjustment To PEO Compensation, Footnote

2.
The following tables set forth the adjustments made during 2024 represented in the PVP table to arrive at CAP to our PEO and average CAP to our other NEOs. The equity award adjustments to arrive at “Compensation Actually Paid” or “CAP” were calculated consistent with FASB ASC 718, and the valuation assumptions used to calculate fair values did not materially differ from those disclosed at the time of grant. For information on our adjustments made during 2020-2023, refer to our 2024 Proxy Statement.

							PEO			Average Non-PEO
	Total Reported in 2024 Summary Compensation Table (SCT)						$4,387,806			$1,837,740
				Less, value of Stock Awards reported in SCT			$2,334,161			$885,893
				Plus, Year-End Fair Value of Awards Granted in the Fiscal Year that are Unvested and Outstanding			$5,542,109			$2,103,417
				Plus, Change in Fair Value of Prior Year Awards that are Outstanding and Unvested			$2,231,285			$809,087
				Plus, FMV of Awards Granted this Year and that Vested this Year			—			—
				Plus, Change in Fair Value (from prior year-end to vesting date) of Prior Year Awards that Vested during the Fiscal Year			$14,496			$2,648
				Less, Prior Year Fair Value of Prior Year Awards that Failed to Vest this Year			—			—
	Total Adjustments						$5,453,729			$2,029,259
	Compensation Actually Paid for 2024						$9,841,535			$3,866,999

Non-PEO NEO Average Total Compensation Amount

$ 1,837,740

1,722,556

1,558,682

1,479,751

1,546,507

Non-PEO NEO Average Compensation Actually Paid Amount

$ 3,866,999

1,595,045

1,028,030

1,177,195

2,652,357

Adjustment to Non-PEO NEO Compensation Footnote

2.
The following tables set forth the adjustments made during 2024 represented in the PVP table to arrive at CAP to our PEO and average CAP to our other NEOs. The equity award adjustments to arrive at “Compensation Actually Paid” or “CAP” were calculated consistent with FASB ASC 718, and the valuation assumptions used to calculate fair values did not materially differ from those disclosed at the time of grant. For information on our adjustments made during 2020-2023, refer to our 2024 Proxy Statement.

							PEO			Average Non-PEO
	Total Reported in 2024 Summary Compensation Table (SCT)						$4,387,806			$1,837,740
				Less, value of Stock Awards reported in SCT			$2,334,161			$885,893
				Plus, Year-End Fair Value of Awards Granted in the Fiscal Year that are Unvested and Outstanding			$5,542,109			$2,103,417
				Plus, Change in Fair Value of Prior Year Awards that are Outstanding and Unvested			$2,231,285			$809,087
				Plus, FMV of Awards Granted this Year and that Vested this Year			—			—
				Plus, Change in Fair Value (from prior year-end to vesting date) of Prior Year Awards that Vested during the Fiscal Year			$14,496			$2,648
				Less, Prior Year Fair Value of Prior Year Awards that Failed to Vest this Year			—			—
	Total Adjustments						$5,453,729			$2,029,259
	Compensation Actually Paid for 2024						$9,841,535			$3,866,999

Compensation Actually Paid vs. Total Shareholder Return

The following graphs compare CAP to (1) company and peer group TSR (represented by the NYSE Arca Gold Miners Index), (2) Net Income and (3) Adjusted EBITDA.

Compensation Actually Paid vs. Net Income

The following graphs compare CAP to (1) company and peer group TSR (represented by the NYSE Arca Gold Miners Index), (2) Net Income and (3) Adjusted EBITDA.

Compensation Actually Paid vs. Company Selected Measure

The following graphs compare CAP to (1) company and peer group TSR (represented by the NYSE Arca Gold Miners Index), (2) Net Income and (3) Adjusted EBITDA.

Total Shareholder Return Vs Peer Group

The following graphs compare CAP to (1) company and peer group TSR (represented by the NYSE Arca Gold Miners Index), (2) Net Income and (3) Adjusted EBITDA.

Tabular List, Table

Additional Performance Measures

The following performance measures reflect the Company’s most important performance measures used to link compensation actually paid to NEOs to performance in 2024, as further described and defined in the CD&A.

	Adjusted EBITDA
	ROIC
	Production
	Costs Applicable to Sales
	Growth in Reserves and Resources
	Environmental, Health and Safety Performance
	Strategic Initiatives
	rTSR

Total Shareholder Return Amount

$ 71

40

42

62

128

Peer Group Total Shareholder Return Amount

125

113

102

112

124

Net Income (Loss)

$ 58,900,000

$ (103,612,000)

$ (78,107,000)

$ (31,322,000)

$ 25,627,000

Company Selected Measure Amount

339,152,000

142,302,000

138,954,000

216,112,000

263,565,000

PEO Name

Mitchell J. Krebs

Mitchell J. Krebs

Mitchell J. Krebs

Mitchell J. Krebs

Mitchell J. Krebs

Measure:: 1

Pay vs Performance Disclosure

Name

Adjusted EBITDA

Non-GAAP Measure Description

5.
Adjusted EBITDA, a non-GAAP financial reporting measure, is used by the Company to evaluate operating performance of our core mining business and allows investors and analysts to compare results of the Company to similar results of other mining companies. For a reconciliation of Adjusted EBITDA to net income, please refer to the tables in Appendix A.

Measure:: 2

Pay vs Performance Disclosure

Name

ROIC

Measure:: 3

Pay vs Performance Disclosure

Name

Production

Measure:: 4

Pay vs Performance Disclosure

Name

Costs Applicable to Sales

Measure:: 5

Pay vs Performance Disclosure

Name

Growth in Reserves and Resources

Measure:: 6

Pay vs Performance Disclosure

Name

Environmental, Health and Safety Performance

Measure:: 7

Pay vs Performance Disclosure

Name

Strategic Initiatives

Measure:: 8

Pay vs Performance Disclosure

Name

rTSR

PEO

Pay vs Performance Disclosure

Adjustment to Compensation, Amount

$ 5,453,729

PEO | Aggregate Grant Date Fair Value of Equity Award Amounts Reported in Summary Compensation Table

Pay vs Performance Disclosure

Adjustment to Compensation, Amount

(2,334,161)

PEO | Year-end Fair Value of Equity Awards Granted in Covered Year that are Outstanding and Unvested

Pay vs Performance Disclosure

Adjustment to Compensation, Amount

5,542,109

PEO | Year-over-Year Change in Fair Value of Equity Awards Granted in Prior Years That are Outstanding and Unvested

Pay vs Performance Disclosure

Adjustment to Compensation, Amount

2,231,285

PEO | Vesting Date Fair Value of Equity Awards Granted and Vested in Covered Year

Pay vs Performance Disclosure

Adjustment to Compensation, Amount

0

PEO | Change in Fair Value as of Vesting Date of Prior Year Equity Awards Vested in Covered Year

Pay vs Performance Disclosure

Adjustment to Compensation, Amount

14,496

PEO | Prior Year End Fair Value of Equity Awards Granted in Any Prior Year that Fail to Meet Applicable Vesting Conditions During Covered Year

Pay vs Performance Disclosure

Adjustment to Compensation, Amount

0

Non-PEO NEO

Pay vs Performance Disclosure

Adjustment to Compensation, Amount

2,029,259

Non-PEO NEO | Aggregate Grant Date Fair Value of Equity Award Amounts Reported in Summary Compensation Table

Pay vs Performance Disclosure

Adjustment to Compensation, Amount

(885,893)

Non-PEO NEO | Year-end Fair Value of Equity Awards Granted in Covered Year that are Outstanding and Unvested

Pay vs Performance Disclosure

Adjustment to Compensation, Amount

2,103,417

Non-PEO NEO | Year-over-Year Change in Fair Value of Equity Awards Granted in Prior Years That are Outstanding and Unvested

Pay vs Performance Disclosure

Adjustment to Compensation, Amount

809,087

Non-PEO NEO | Vesting Date Fair Value of Equity Awards Granted and Vested in Covered Year

Pay vs Performance Disclosure

Adjustment to Compensation, Amount

0

Non-PEO NEO | Change in Fair Value as of Vesting Date of Prior Year Equity Awards Vested in Covered Year

Pay vs Performance Disclosure

Adjustment to Compensation, Amount

2,648

Non-PEO NEO | Prior Year End Fair Value of Equity Awards Granted in Any Prior Year that Fail to Meet Applicable Vesting Conditions During Covered Year

Pay vs Performance Disclosure

Adjustment to Compensation, Amount

$ 0