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Disclosure of information on segments (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Operating income      
Sale of goods $ 801,199 $ 863,470 $ 637,619
Sale of services 22,222 21,052 20,285
Royalty income 1,381 15,928 18,638
Total operating income 824,802 900,450 676,542
Operating costs      
Cost of sales, excluding depreciation and amortization (461,942) (529,731) (393,888)
Unabsorbed cost due to production stoppage (23,058) (25,509) (27,758)
Cost of services 3,163 (1,269) 1,554
Exploration in operating units (80,796) (56,412) (28,044)
Depreciation and amortization (176,781) (187,211) (189,620)
Mining royalties (17,733) (12,974) (11,749)
Total operating costs (763,473) (813,106) (652,613)
Gross profit (loss) 61,329 87,344 23,929
Operating expenses, net      
Administrative expenses (67,728) (67,585) (67,185)
Selling expenses (20,222) (20,827) (18,533)
Write-off of stripping activity asset 0 (6,763) (11,633)
Exploration in non-operating areas (14,252) (11,270) (8,475)
Reversal of contingent and others (2,935) (2,687) (4,150)
Impairment recovery (loss) of long-lived assets 19,874 (14,910) 2,083
Provision for contingencies and others (2,935) (2,687) (4,150)
Other, net (15,085) (29,260) 2,690
Total operating expenses, net (100,348) (153,302) (105,203)
Operating profit (loss) (39,019) (65,958) (81,274)
Other income (expense),net      
Finance income 14,443 5,952 2,411
Foreign currency exchange difference 26,871 (18,686) (4,116)
Share in the results of associates and joint ventures 176,270 240,450 62,702
Finance costs (54,136) (60,629) (37,822)
Profit (loss) before income tax 124,429 101,129 (58,099)
Income tax expense (41) 23,671 (25,430)
Current income tax (15,633) (20,375) (9,924)
Deferred Income tax 15,592 44,046 (15,506)
Profit (loss) for the year (numerators) 124,388 124,800 (83,529)
Loss per basic share 478,547 (387,604) (66,810)
Profit for the year 602,935 (262,804) (150,339)
Total assets 4,503,227 4,561,811 3,979,617
Total assets   4,561,811  
Total liability 1,340,286 2,023,280 1,179,760
Total liability   2,023,280 1,179,760
Other segment information      
Investments in associates 1,520,977 1,422,295 1,488,775
Capital Expenditures 151,973 90,309 71,546
Changes in estimates of mine closures plans (21,869) (3,272) 31,558
Exploration and development mining projects [Member]      
Operating income      
Sale of goods 0 0 0
Sale of services 0 0 0
Royalty income 0 0 0
Total operating income 0 0 0
Operating costs      
Cost of sales, excluding depreciation and amortization 0 0 0
Unabsorbed cost due to production stoppage 0 0 0
Cost of services 0 0 0
Exploration in operating units 0 0 0
Depreciation and amortization 0 0 0
Mining royalties 0 0 0
Total operating costs 0 0 0
Gross profit (loss) 0 0 0
Operating expenses, net      
Administrative expenses (1,528) (1,447) (1,649)
Selling expenses 0 0 0
Write-off of stripping activity asset   0 0
Exploration in non-operating areas (282) (1,011) 0
Reversal of contingent and others 108 132 33
Impairment recovery (loss) of long-lived assets 0 0 0
Other, net (931) (371) (593)
Total operating expenses, net (2,633) (2,697) (2,209)
Operating profit (loss) (2,633) (2,697) (2,209)
Other income (expense),net      
Finance income 11 0 1
Foreign currency exchange difference 604 (1,210) (808)
Share in the results of associates and joint ventures 0 0 0
Finance costs (297) (238) (387)
Profit (loss) before income tax (2,315) (4,145) (3,403)
Income tax expense 0 0 0
Current income tax 0 0 0
Deferred Income tax 0 0 0
Profit (loss) for the year (numerators) (2,315) (4,145) (3,403)
Total assets 496,198   425,731
Total assets   442,335  
Total liability 21,844    
Total liability   21,764 22,695
Other segment information      
Investments in associates 0 0 0
Capital Expenditures 46,459 22,513 24,648
Changes in estimates of mine closures plans (6,576) (679) 808
Energy generation and transmission [Member]      
Operating income      
Sale of goods 0 0 0
Sale of services 52,433 53,083 48,254
Royalty income 0 0 0
Total operating income 52,433 53,083 48,254
Operating costs      
Cost of sales, excluding depreciation and amortization 0 0 0
Unabsorbed cost due to production stoppage 0 0 0
Cost of services 24,861 (20,781) 17,868
Exploration in operating units 0 0 0
Depreciation and amortization (9,040) (8,995) (9,347)
Mining royalties 0 0 0
Total operating costs (33,901) (29,776) (27,215)
Gross profit (loss) 18,532 23,307 21,039
Operating expenses, net      
Administrative expenses (2,948) (2,942) (2,863)
Selling expenses (770) (740) (784)
Write-off of stripping activity asset   0 0
Exploration in non-operating areas 0 0 0
Reversal of contingent and others (440) 111 501
Impairment recovery (loss) of long-lived assets 0 0 0
Other, net (196) 134 796
Total operating expenses, net (4,354) (3,437) (2,350)
Operating profit (loss) 14,178 19,870 18,689
Other income (expense),net      
Finance income 394 124 1,622
Foreign currency exchange difference (207) (377) (402)
Share in the results of associates and joint ventures 7,008 20,525 4,331
Finance costs (5,337) (4,731) (4,690)
Profit (loss) before income tax 16,036 35,411 19,550
Income tax expense (2,433) 5,692 (10,168)
Current income tax (3,238) (1,132) (780)
Deferred Income tax 805 6,824 (9,388)
Profit (loss) for the year (numerators) 13,603 41,103 9,382
Total assets 377,679   357,830
Total assets   385,626  
Total liability 131,540    
Total liability   153,090 166,396
Other segment information      
Investments in associates 121,650 99,352 94,117
Capital Expenditures 1,487 754 371
Changes in estimates of mine closures plans 0 0 0
Insurance brokerage [Member]      
Operating income      
Sale of goods 0 0 0
Sale of services 17,207 15,651 14,753
Royalty income 0 0 0
Total operating income 17,207 15,651 14,753
Operating costs      
Cost of sales, excluding depreciation and amortization 0 0 0
Unabsorbed cost due to production stoppage 0 0 0
Cost of services 0 0 0
Exploration in operating units 0 0 0
Depreciation and amortization 0 0 0
Mining royalties 0 0 0
Total operating costs 0 0 0
Gross profit (loss) 17,207 15,651 14,753
Operating expenses, net      
Administrative expenses (12,694) (11,796) (10,939)
Selling expenses 0 0 0
Write-off of stripping activity asset   0 0
Exploration in non-operating areas 0 0 0
Reversal of contingent and others 0 0 0
Impairment recovery (loss) of long-lived assets 0 0 0
Other, net 0 0 0
Total operating expenses, net (12,694) (11,796) (10,939)
Operating profit (loss) 4,513 3,855 3,814
Other income (expense),net      
Finance income 0 0 27
Foreign currency exchange difference (45) 397 65
Share in the results of associates and joint ventures 0 (15) 0
Finance costs (48) (52) (55)
Profit (loss) before income tax 4,420 4,185 3,851
Income tax expense (1,186) (1,603) (1,303)
Current income tax (1,197) (1,673) (1,475)
Deferred Income tax 11 70 172
Profit (loss) for the year (numerators) 3,234 2,582 2,548
Total assets 14,436   15,932
Total assets   19,152  
Total liability 6,107    
Total liability   6,343 5,569
Other segment information      
Investments in associates 0 0 0
Capital Expenditures 25 139 106
Changes in estimates of mine closures plans 0 0 0
Rental of mining concessions [Member]      
Operating income      
Sale of goods 0 0 0
Sale of services 0 0 0
Royalty income 1,381 15,928 18,638
Total operating income 1,381 15,928 18,638
Operating costs      
Cost of sales, excluding depreciation and amortization 0 0 0
Unabsorbed cost due to production stoppage 0 0 0
Cost of services 0 0 0
Exploration in operating units 0 0 0
Depreciation and amortization 0 0 0
Mining royalties 0 0 0
Total operating costs 0 0 0
Gross profit (loss) 1,381 15,928 18,638
Operating expenses, net      
Administrative expenses (218) (242) (112)
Selling expenses 0 0 0
Write-off of stripping activity asset   0 0
Exploration in non-operating areas 0 0 0
Reversal of contingent and others (98) 15 0
Impairment recovery (loss) of long-lived assets 0 0 0
Other, net 8,162 34 63
Total operating expenses, net (7,846) (193) (49)
Operating profit (loss) 9,227 15,735 18,589
Other income (expense),net      
Finance income 5 0 9
Foreign currency exchange difference 1 (83) (49)
Share in the results of associates and joint ventures 0 0 0
Finance costs (2) (2) (2)
Profit (loss) before income tax 9,231 15,650 18,547
Income tax expense (2,714) (4,661) (5,543)
Current income tax (2,714) (4,661) (5,543)
Deferred Income tax 0 0 0
Profit (loss) for the year (numerators) 6,517 10,989 13,004
Total assets 3,306   6,813
Total assets   4,927  
Total liability 139    
Total liability   1,717 2,694
Other segment information      
Investments in associates 0 0 0
Capital Expenditures 0 0 0
Changes in estimates of mine closures plans 0 0 0
Holding of investment in shares [Member]      
Operating income      
Sale of goods 0 0 0
Sale of services 421 551 607
Royalty income 0 0 0
Total operating income 421 551 607
Operating costs      
Cost of sales, excluding depreciation and amortization 0 0 0
Unabsorbed cost due to production stoppage 0 0 0
Cost of services 0 0 0
Exploration in operating units 0 0 0
Depreciation and amortization 0 0 0
Mining royalties 0 0 0
Total operating costs 0 0 0
Gross profit (loss) 421 551 607
Operating expenses, net      
Administrative expenses (617) (1,687) (398)
Selling expenses 0 0 0
Write-off of stripping activity asset   0 0
Exploration in non-operating areas 0 0 0
Reversal of contingent and others 0 0 0
Impairment recovery (loss) of long-lived assets 0 0 0
Other, net (2,472) (44) (10)
Total operating expenses, net (3,089) (1,731) (408)
Operating profit (loss) (2,668) (1,180) 199
Other income (expense),net      
Finance income 308 0 0
Foreign currency exchange difference (693) (7) 91
Share in the results of associates and joint ventures 4,756 (411,974) (67,018)
Finance costs (29) (1) (1)
Profit (loss) before income tax 1,674 (413,162) (66,729)
Income tax expense 1,182 (121) (177)
Current income tax 1,289 (121) (177)
Deferred Income tax (107) 0 0
Profit (loss) for the year (numerators) 2,856 (413,283) (66,906)
Total assets 231,820   362,419
Total assets   261,803  
Total liability 226    
Total liability   275,814 340
Other segment information      
Investments in associates 213,682 207,233 159,529
Capital Expenditures 3 0 0
Changes in estimates of mine closures plans 0 0 0
Industrial activities [Member]      
Operating income      
Sale of goods 53,073 47,024 36,541
Sale of services 0 13,876 15,335
Royalty income 0 0 0
Total operating income 53,073 60,900 51,876
Operating costs      
Cost of sales, excluding depreciation and amortization (52,122) (46,811) (38,607)
Unabsorbed cost due to production stoppage (1,973) (1,050) (597)
Cost of services 0 (3,940) 5,075
Exploration in operating units 0 0 0
Depreciation and amortization (6,396) (11,569) (10,876)
Mining royalties 0 0 0
Total operating costs (60,491) (63,370) (55,155)
Gross profit (loss) (7,418) (2,470) (3,279)
Operating expenses, net      
Administrative expenses (442) (1,102) (1,498)
Selling expenses (177) (559) (687)
Write-off of stripping activity asset   0 0
Exploration in non-operating areas 0 0 0
Reversal of contingent and others 0 9 9
Impairment recovery (loss) of long-lived assets 19,874 (19,874) 0
Other, net 321 (82) 989
Total operating expenses, net (19,576) (21,608) (1,187)
Operating profit (loss) 12,158 (24,078) (4,466)
Other income (expense),net      
Finance income 54 12 38
Foreign currency exchange difference 1,218 (1,824) (984)
Share in the results of associates and joint ventures 0 0 0
Finance costs (25) (98) (175)
Profit (loss) before income tax 13,405 (25,988) (5,587)
Income tax expense 3,208 (1,692) (518)
Current income tax 0 (291) (171)
Deferred Income tax 3,208 (1,401) (347)
Profit (loss) for the year (numerators) 16,613 (27,680) (6,105)
Total assets 74,266   90,337
Total assets   63,551  
Total liability 7,981    
Total liability   13,920 13,025
Other segment information      
Investments in associates 0 0 0
Capital Expenditures 265 1,744 4,611
Changes in estimates of mine closures plans 0 0 0
Corporates [Member]      
Operating income      
Sale of goods 0 0 0
Sale of services 0 0 0
Royalty income 0 0 0
Total operating income 0 0 0
Operating costs      
Cost of sales, excluding depreciation and amortization 0 0 0
Unabsorbed cost due to production stoppage 0 0 0
Cost of services 0 0 0
Exploration in operating units 0 0 0
Depreciation and amortization 0 0 0
Mining royalties 0 0 0
Total operating costs 0 0 0
Gross profit (loss) 0 0 0
Operating expenses, net      
Administrative expenses (5,966) (4,534) (5,965)
Selling expenses 0 0 0
Write-off of stripping activity asset   0 0
Exploration in non-operating areas (4,737) (3,100) (3,623)
Reversal of contingent and others 442 (436) (3,242)
Impairment recovery (loss) of long-lived assets 0 0 0
Other, net (6,090) (80) 1,186
Total operating expenses, net (16,351) (8,150) (11,644)
Operating profit (loss) (16,351) (8,150) (11,644)
Other income (expense),net      
Finance income 12,226 5,659 1,405
Foreign currency exchange difference 25,235 (9,542) (1,576)
Share in the results of associates and joint ventures 164,823 236,593 43,358
Finance costs (38,900) (45,719) (21,322)
Profit (loss) before income tax 147,033 178,841 10,221
Income tax expense 24,397 38,987 (2,888)
Current income tax (731) 0 0
Deferred Income tax 25,128 38,987 (2,888)
Profit (loss) for the year (numerators) 171,430 217,828 7,333
Total assets 3,047,322   2,343,010
Total assets   3,016,730  
Total liability 655,598    
Total liability   1,243,575 410,197
Other segment information      
Investments in associates 2,099,568 1,971,506 2,040,598
Capital Expenditures 500 1,122 933
Changes in estimates of mine closures plans 0 (35) 0
Uchucchacua      
Operating income      
Sale of goods 5,281 79,375 90,420
Sale of services 0 0 0
Royalty income 0 0 0
Total operating income 5,281 79,375 90,420
Operating costs      
Cost of sales, excluding depreciation and amortization 0 (95,359) (100,097)
Unabsorbed cost due to production stoppage (24,916) (25,326) (9,630)
Cost of services 0 0 0
Exploration in operating units (32,592) (11,090) (6,731)
Depreciation and amortization (9,000) (14,083) (16,752)
Mining royalties (46) (998) (1,068)
Total operating costs (66,554) (146,856) (134,278)
Gross profit (loss) (61,273) (67,481) (43,858)
Operating expenses, net      
Administrative expenses (651) (6,758) (9,140)
Selling expenses (3,634) (3,738) (3,806)
Write-off of stripping activity asset   0 0
Exploration in non-operating areas (15) (65) (27)
Reversal of contingent and others (44) (1,291) 28
Impairment recovery (loss) of long-lived assets 0 0 0
Other, net 2,453 (7,865) 2,776
Total operating expenses, net (1,891) (19,717) (10,169)
Operating profit (loss) (63,164) (87,198) (54,027)
Other income (expense),net      
Finance income 12 0 0
Foreign currency exchange difference (290) (2,010) (72)
Share in the results of associates and joint ventures 0 0 0
Finance costs (496) (431) (268)
Profit (loss) before income tax (63,938) (89,639) (54,367)
Income tax expense (19) (57) (60)
Current income tax (19) (57) (60)
Deferred Income tax 0 0 0
Profit (loss) for the year (numerators) (63,957) (89,696) (54,427)
Total assets 127,479   145,287
Total assets   111,885  
Total liability 55,792    
Total liability   62,279 62,024
Other segment information      
Investments in associates 0 0 0
Capital Expenditures 32,000 16,109 10,443
Changes in estimates of mine closures plans (3,107) (517) 11,745
Orcopampa      
Operating income      
Sale of goods 134,268 89,567 77,825
Sale of services 0 0 0
Royalty income 0 0 0
Total operating income 134,268 89,567 77,825
Operating costs      
Cost of sales, excluding depreciation and amortization (58,108) (56,183) (37,139)
Unabsorbed cost due to production stoppage 0 0 (3,849)
Cost of services 0 0 0
Exploration in operating units (11,594) (11,466) (5,198)
Depreciation and amortization (7,757) (8,409) (8,102)
Mining royalties (12,220) (7,636) (6,943)
Total operating costs (89,679) (83,694) (61,231)
Gross profit (loss) 44,589 5,873 16,594
Operating expenses, net      
Administrative expenses (12,406) (7,649) (7,948)
Selling expenses (560) (401) (436)
Write-off of stripping activity asset   0 0
Exploration in non-operating areas 0 0 0
Reversal of contingent and others 544 70 (322)
Impairment recovery (loss) of long-lived assets 0 0 0
Other, net 124 (501) (1,922)
Total operating expenses, net (12,298) (8,481) (10,628)
Operating profit (loss) 32,291 (2,608) 5,966
Other income (expense),net      
Finance income 2 0 0
Foreign currency exchange difference 99 (129) 126
Share in the results of associates and joint ventures 0 0 0
Finance costs (546) (493) (913)
Profit (loss) before income tax 31,846 (3,230) 5,179
Income tax expense (465) (65) (55)
Current income tax (465) (65) (55)
Deferred Income tax 0 0 0
Profit (loss) for the year (numerators) 31,381 (3,295) 5,124
Total assets 62,083   47,855
Total assets   47,734  
Total liability 52,429    
Total liability   48,659 46,787
Other segment information      
Investments in associates 0 0 0
Capital Expenditures 3,584 2,983 1,064
Changes in estimates of mine closures plans 5,112 (390) 5,042
Julcani [Member]      
Operating income      
Sale of goods 54,573 56,065 32,034
Sale of services 0 0 0
Royalty income 0 0 0
Total operating income 54,573 56,065 32,034
Operating costs      
Cost of sales, excluding depreciation and amortization (30,215) (31,319) (16,679)
Unabsorbed cost due to production stoppage 0 0 (5,167)
Cost of services 0 0 0
Exploration in operating units (6,747) (6,107) (3,167)
Depreciation and amortization (6,444) (6,849) (6,412)
Mining royalties (472) (599) (278)
Total operating costs (43,878) (44,874) (31,703)
Gross profit (loss) 10,695 11,191 331
Operating expenses, net      
Administrative expenses (5,028) (4,737) (3,288)
Selling expenses (389) (480) (438)
Write-off of stripping activity asset   0 0
Exploration in non-operating areas 0 0 0
Reversal of contingent and others (1,776) 320 (195)
Impairment recovery (loss) of long-lived assets 0 0 2,083
Other, net (793) (844) (212)
Total operating expenses, net (7,986) (5,741) (2,050)
Operating profit (loss) 2,709 5,450 (1,719)
Other income (expense),net      
Finance income 4 0 0
Foreign currency exchange difference 100 (612) 78
Share in the results of associates and joint ventures 0 0 0
Finance costs (382) (484) (636)
Profit (loss) before income tax 2,431 4,354 (2,277)
Income tax expense (175) (41) (16)
Current income tax (175) (41) (16)
Deferred Income tax 0 0 0
Profit (loss) for the year (numerators) 2,256 4,313 (2,293)
Total assets 34,131   45,999
Total assets   30,449  
Total liability 31,388    
Total liability   32,912 34,431
Other segment information      
Investments in associates 0 0 0
Capital Expenditures 1,559 2,362 1,059
Changes in estimates of mine closures plans 3,585 (108) 771
Colquijirca [Member]      
Operating income      
Sale of goods 400,994 410,390 255,275
Sale of services 0 0 0
Royalty income 0 0 0
Total operating income 400,994 410,390 255,275
Operating costs      
Cost of sales, excluding depreciation and amortization (267,997) (248,021) (170,148)
Unabsorbed cost due to production stoppage 0 0 (10,216)
Cost of services 0 0 0
Exploration in operating units (16,671) (17,099) (5,790)
Depreciation and amortization (72,171) (68,830) (59,433)
Mining royalties (3,168) (1,626) (1,902)
Total operating costs (360,007) (335,576) (247,489)
Gross profit (loss) 40,987 74,814 7,786
Operating expenses, net      
Administrative expenses (8,744) (7,229) (7,536)
Selling expenses (9,649) (9,946) (9,070)
Write-off of stripping activity asset   (6,763) (11,633)
Exploration in non-operating areas (4,008) (1,383) (86)
Reversal of contingent and others (1,706) (356) (1,145)
Impairment recovery (loss) of long-lived assets 0 0 0
Other, net (7,777) (12,571) 4,547
Total operating expenses, net (31,884) (38,248) (24,923)
Operating profit (loss) 9,103 36,566 (17,137)
Other income (expense),net      
Finance income 879 388 257
Foreign currency exchange difference 526 (2,346) (404)
Share in the results of associates and joint ventures (10) 36 (253)
Finance costs (6,470) (7,126) (9,175)
Profit (loss) before income tax 4,028 27,518 (26,712)
Income tax expense (3,666) (16,956) (4,829)
Current income tax (6,125) (12,220) (1,483)
Deferred Income tax 2,459 (4,736) (3,346)
Profit (loss) for the year (numerators) 362 10,562 (31,541)
Total assets 668,230   720,150
Total assets   694,831  
Total liability 290,998    
Total liability   327,519 366,705
Other segment information      
Investments in associates 2,486 2,497 2,374
Capital Expenditures 62,593 37,649 23,955
Changes in estimates of mine closures plans (11,322) (1,410) 2,437
La Zanja [Member]      
Operating income      
Sale of goods 52,260 39,380 33,033
Sale of services 0 0 0
Royalty income 0 0 0
Total operating income 52,260 39,380 33,033
Operating costs      
Cost of sales, excluding depreciation and amortization (49,903) (46,531) (31,978)
Unabsorbed cost due to production stoppage 0 0 (203)
Cost of services 0 0 0
Exploration in operating units (3,212) (574) (1)
Depreciation and amortization (7,459) (5,449) (6,595)
Mining royalties (506) (403) (330)
Total operating costs (61,080) (52,957) (39,107)
Gross profit (loss) (8,820) (13,577) (6,074)
Operating expenses, net      
Administrative expenses (3,061) (2,932) (2,434)
Selling expenses (179) (124) (104)
Write-off of stripping activity asset   0 0
Exploration in non-operating areas (5,243) (5,742) (4,769)
Reversal of contingent and others (353) (1,029) 173
Impairment recovery (loss) of long-lived assets 0 4,964 0
Other, net (7,374) (44) (712)
Total operating expenses, net (16,210) (4,907) (7,846)
Operating profit (loss) (25,030) (18,484) (13,920)
Other income (expense),net      
Finance income 614 196 780
Foreign currency exchange difference 336 (296) (306)
Share in the results of associates and joint ventures 0 0 0
Finance costs (1,318) (1,361) (1,484)
Profit (loss) before income tax (25,398) (19,945) (14,930)
Income tax expense (16,132) 4,212 218
Current income tax (187) 0 (17)
Deferred Income tax (15,945) 4,212 235
Profit (loss) for the year (numerators) (41,530) (15,733) (14,712)
Total assets 79,038   134,562
Total assets   121,681  
Total liability 80,655    
Total liability   81,770 78,916
Other segment information      
Investments in associates 0 0 0
Capital Expenditures 1,719 999 825
Changes in estimates of mine closures plans (8,705) 175 9,569
Tambomayo [Member]      
Operating income      
Sale of goods 151,789 181,021 142,833
Sale of services 0 0 0
Royalty income 0 0 0
Total operating income 151,789 181,021 142,833
Operating costs      
Cost of sales, excluding depreciation and amortization (76,214) (82,531) (64,107)
Unabsorbed cost due to production stoppage 0 0 (822)
Cost of services 0 0 0
Exploration in operating units (9,980) (10,076) (7,157)
Depreciation and amortization (59,125) (63,638) (72,714)
Mining royalties (1,322) (1,712) (1,228)
Total operating costs (146,641) (157,957) (146,028)
Gross profit (loss) 5,148 23,064 (3,195)
Operating expenses, net      
Administrative expenses (14,076) (15,382) (14,548)
Selling expenses (5,126) (5,485) (3,862)
Write-off of stripping activity asset   0 0
Exploration in non-operating areas 0 0 0
Reversal of contingent and others (228) 25 10
Impairment recovery (loss) of long-lived assets 0 0 0
Other, net (815) (4,797) (1,376)
Total operating expenses, net (20,245) (25,639) (19,776)
Operating profit (loss) (15,097) (2,575) (22,971)
Other income (expense),net      
Finance income 4 0 0
Foreign currency exchange difference (11) (641) 130
Share in the results of associates and joint ventures 0 0 0
Finance costs (302) (270) (390)
Profit (loss) before income tax (15,406) (3,486) (23,231)
Income tax expense (527) (132) (93)
Current income tax (527) (132) (93)
Deferred Income tax 0 0 0
Profit (loss) for the year (numerators) (15,933) (3,618) (23,324)
Total assets 197,550   329,384
Total assets   264,521  
Total liability 29,654    
Total liability   36,551 38,923
Other segment information      
Investments in associates 0 0 0
Capital Expenditures 3,175 3,935 3,531
Changes in estimates of mine closures plans (856) (308) 1,186
Operating Segments [Member]      
Operating income      
Sale of goods 4,986,536 5,317,751 3,409,717
Sale of services 70,061 83,161 78,949
Royalty income 1,381 15,928 18,638
Total operating income 5,057,978 5,416,840 3,507,304
Operating costs      
Cost of sales, excluding depreciation and amortization (3,016,839) (2,985,832) (2,546,139)
Unabsorbed cost due to production stoppage (26,889) (26,376) (30,484)
Cost of services 24,861 (24,721) 22,943
Exploration in operating units (89,763) (62,603) (28,044)
Depreciation and amortization (220,342) (231,520) (190,231)
Mining royalties (19,234) (13,503) (11,749)
Total operating costs (3,397,928) (3,344,555) (2,829,590)
Gross profit (loss) 1,660,050 2,072,285 677,714
Operating expenses, net      
Administrative expenses (76,901) (77,847) (74,672)
Selling expenses (178,875) (22,587) (20,477)
Write-off of stripping activity asset   (6,763) (11,633)
Exploration in non-operating areas (14,285) (11,301) (8,505)
Reversal of contingent and others (3,477) (2,430) (4,150)
Impairment recovery (loss) of long-lived assets 19,874 (14,910) 2,083
Other, net (39,004) (26,875) 5,720
Total operating expenses, net (292,668) (162,713) (111,634)
Operating profit (loss) 1,367,382 1,909,572 566,080
Other income (expense),net      
Finance income 33,709 6,626 6,900
Foreign currency exchange difference 27,802 8,994 47,086
Share in the results of associates and joint ventures 176,577 (154,835) (19,582)
Finance costs (66,847) (92,394) (184,705)
Profit (loss) before income tax 1,538,623 1,677,963 415,779
Income tax expense (501,504) (743,960) (286,080)
Current income tax (462,118) (752,550) (271,597)
Deferred Income tax (39,386) 8,590 (14,483)
Profit (loss) for the year (numerators) 1,037,119 934,003 129,699
Total assets 13,836,447 14,063,903 13,276,273
Total assets   14,063,903  
Total liability 2,824,648 4,454,433 3,532,172
Total liability   4,454,433 3,532,172
Other segment information      
Investments in associates 2,437,386 2,280,588 2,296,618
Capital Expenditures 153,369 90,309 71,546
Changes in estimates of mine closures plans (21,869) (3,272) 31,558
Elimination of intersegment amounts [member]      
Operating income      
Sale of goods (4,185,337) (4,454,281) (2,772,098)
Sale of services (47,839) (62,109) (58,664)
Royalty income 0 0 0
Total operating income (4,233,176) (4,516,390) (2,830,762)
Operating costs      
Cost of sales, excluding depreciation and amortization 2,554,897 2,456,101 2,152,251
Unabsorbed cost due to production stoppage 3,831 867 2,726
Cost of services (21,698) 23,452 (21,389)
Exploration in operating units 8,967 6,191 0
Depreciation and amortization 43,561 44,309 611
Mining royalties 1,501 529 0
Total operating costs 2,634,455 2,531,449 2,176,977
Gross profit (loss) (1,598,721) (1,984,941) (653,785)
Operating expenses, net      
Administrative expenses 9,173 10,262 7,487
Selling expenses 158,653 1,760 1,944
Write-off of stripping activity asset   0 0
Exploration in non-operating areas 33 31 30
Reversal of contingent and others 542 (257) 0
Impairment recovery (loss) of long-lived assets 0 0 0
Other, net 23,919 (2,385) (3,030)
Total operating expenses, net 192,320 9,411 6,431
Operating profit (loss) (1,406,401) (1,975,530) (647,354)
Other income (expense),net      
Finance income (19,266) (674) (4,489)
Foreign currency exchange difference (931) (27,680) (51,202)
Share in the results of associates and joint ventures (307) 395,285 82,284
Finance costs 12,711 31,765 146,883
Profit (loss) before income tax (1,414,194) (1,576,834) (473,878)
Income tax expense 501,463 767,631 260,650
Current income tax 446,485 732,175 261,673
Deferred Income tax 54,978 35,456 (1,023)
Profit (loss) for the year (numerators) (912,731) (809,203) (213,228)
Total assets (9,333,220)   (9,296,656)
Total assets   (9,502,092)  
Total liability (1,484,362)    
Total liability   (2,431,153) (2,352,412)
Other segment information      
Investments in associates (916,409) (858,293) (807,843)
Capital Expenditures (1,396) 0 0
Changes in estimates of mine closures plans 0 0 0
Sociedad Minera Cerro Verde S.A.A.      
Operating income      
Sale of goods 3,975,295 4,199,448 2,538,593
Sale of services 0 0 0
Royalty income 0 0 0
Total operating income 3,975,295 4,199,448 2,538,593
Operating costs      
Cost of sales, excluding depreciation and amortization (2,367,767) (2,272,989) (1,939,262)
Unabsorbed cost due to production stoppage 0 0 0
Cost of services 0 0 0
Exploration in operating units 0 0 0
Depreciation and amortization (492,042) (471,759) (451,001)
Mining royalties (9,308) (10,334) (5,889)
Total operating costs (2,367,767) (2,272,989) (1,939,262)
Gross profit (loss) 1,607,528 1,926,459 599,331
Operating expenses, net      
Administrative expenses 0 0 0
Selling expenses (157,373) (109,886) (97,680)
Write-off of stripping activity asset   0 0
Exploration in non-operating areas 0 0 0
Reversal of contingent and others 0 0 0
Impairment recovery (loss) of long-lived assets 0 0 0
Other, net (23,933) 0 0
Total operating expenses, net (181,306) 0 0
Operating profit (loss) 1,426,222 1,926,459 599,331
Other income (expense),net      
Finance income 17,235 2,820 2,350
Foreign currency exchange difference 980 (31,500) 52,464
Share in the results of associates and joint ventures 0 0 0
Finance costs (10,537) (28,775) (142,675)
Profit (loss) before income tax 1,433,900 1,927,177 511,470
Income tax expense (508,547) (735,703) (236,926)
Current income tax (445,078) (704,455) (236,926)
Deferred Income tax (62,718) (30,864) (25,962)
Profit (loss) for the year (numerators) 925,353 1,191,474 274,544
Profit for the year 925,353,000 1,191,474,000 274,544,000
Total assets 7,993,863   7,767,459
Total assets   8,124,564  
Total liability 1,342,436    
Total liability   1,997,558 2,132,131
Other segment information      
Investments in associates 0 0 0
Capital Expenditures 0 0 0
Changes in estimates of mine closures plans 0 0 0
Compania Minera Coimolache S.A.      
Operating income      
Sale of goods 159,003 215,481 203,163
Sale of services 0 0 0
Royalty income 0 0 0
Total operating income 159,003 215,481 203,163
Operating costs      
Cost of sales, excluding depreciation and amortization (114,513) (106,088) (91,089)
Unabsorbed cost due to production stoppage 0 0 0
Cost of services 0 0 0
Exploration in operating units (8,967) (6,191) (3,586)
Depreciation and amortization (42,950) (43,698) (52,732)
Mining royalties (1,500) (529) (715)
Total operating costs (167,930) (156,506) (148,122)
Gross profit (loss) (8,927) 58,975 55,041
Operating expenses, net      
Administrative expenses (4,139) (3,718) (4,043)
Selling expenses (1,018) (1,114) (1,290)
Write-off of stripping activity asset   0 0
Exploration in non-operating areas 0 0 0
Reversal of contingent and others 74 0 0
Impairment recovery (loss) of long-lived assets 0 0 0
Other, net 317 156 188
Total operating expenses, net (4,766) (4,676) (5,145)
Operating profit (loss) (13,693) 54,299 49,896
Other income (expense),net      
Finance income 1,961 247 411
Foreign currency exchange difference (51) (1,819) (1,267)
Share in the results of associates and joint ventures 0 0 0
Finance costs (2,158) (2,613) (2,532)
Profit (loss) before income tax (13,941) 50,114 46,508
Income tax expense 5,573 (31,820) (23,722)
Current income tax (2,951) (27,702) (24,801)
Deferred Income tax 8,524 (4,118) 1,079
Profit (loss) for the year (numerators) (8,368) 18,294 22,786
Profit for the year (8,368) 18,294 22,786
Total assets 365,585   418,966
Total assets   414,986  
Total liability 117,388    
Total liability   150,751 150,463
Other segment information      
Investments in associates 0 0 0
Capital Expenditures 0 0 0
Changes in estimates of mine closures plans 0 0 0
Tinka resources Ltd      
Operating income      
Sale of goods 0 0 0
Sale of services 0 0 0
Royalty income 0 0 0
Total operating income 0 0 0
Operating costs      
Cost of sales, excluding depreciation and amortization 0 0 0
Unabsorbed cost due to production stoppage 0 0 0
Cost of services 0 0 0
Exploration in operating units 0 0 0
Depreciation and amortization 0 0 0
Mining royalties 0 0 0
Total operating costs 0 0 0
Gross profit (loss) 0 0 0
Operating expenses, net      
Administrative expenses (4,383) (5,692) (2,311)
Selling expenses 0 0 0
Write-off of stripping activity asset   0 0
Exploration in non-operating areas 0 0 0
Reversal of contingent and others 0 0 0
Impairment recovery (loss) of long-lived assets 0 0 0
Other, net 0 0 0
Total operating expenses, net (4,383) (5,692) (2,311)
Operating profit (loss) (4,383) (5,692) (2,311)
Other income (expense),net      
Finance income 0 0 0
Foreign currency exchange difference 0 0 0
Share in the results of associates and joint ventures 0 0 0
Finance costs 0 0 0
Profit (loss) before income tax (4,383) (5,692) (2,311)
Income tax expense 0   0
Current income tax 0 0 0
Deferred Income tax 0 0 0
Profit (loss) for the year (numerators) (4,383) (5,692) (2,311)
Profit for the year (4,383) (1,109) (2,311)
Total assets 63,461   64,539
Total assets   59,128  
Total liability 473    
Total liability   211 876
Other segment information      
Investments in associates 0 0 0
Capital Expenditures 0 0 0
Changes in estimates of mine closures plans $ 0 $ 0 $ 0