v3.26.1
PROPERTY, PLANT AND EQUIPMENT (Tables)
12 Months Ended
Dec. 31, 2025
PROPERTY, PLANT AND EQUIPMENT  
Schedule of property, plant, and equipment, net

December 31, 

(In thousands)

2025

  ​ ​ ​

2024

Plant and equipment

$

390,359

$

331,899

Mining property and mineral rights

139,077

120,532

Construction in process

 

22,264

 

31,048

Capitalized mine development costs

 

221,852

 

199,595

Less: accumulated depreciation, depletion, and amortization

 

(261,609)

 

(201,055)

Total property, plant, and equipment, net

$

511,943

$

482,019

Schedule of Depreciation, depletion, and amortization

Year ended December 31, 

(In thousands)

  ​ ​ ​

2025

  ​ ​ ​

2024

2023

Depreciation of plant and equipment

$

43,348

$

37,283

$

30,913

Amortization of right of use assets (finance leases)

7,840

10,414

8,547

Amortization and depletion of capitalized

mine development costs and mineral rights

 

16,967

 

17,918

 

14,792

Total depreciation, depletion, and amortization

$

68,155

$

65,615

$

54,252