XML 154 R109.htm IDEA: XBRL DOCUMENT v3.20.1
Basis for preparation, consolidation and accounting policies - Impact of Adoption of IFRS 16 on Impact on consolidated statement of cash flows (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Disclosure of basis for preparation, consolidation and accounting policies [Line Items]      
Interest paid $ (28,266) $ (27,699) $ (30,402)
Net cash and cash equivalents provided by operating activities 47,065 346,260 212,582
Payments of lease liabilities (7,596) 0 0
Net cash and cash equivalents provided by (used in) financing activities (100,618) $ (74,052) $ 59,575
IFRS 16 [Member]      
Disclosure of basis for preparation, consolidation and accounting policies [Line Items]      
Short-term and low-value lease payments (24,175)    
Net cash and cash equivalents provided by operating activities (24,175)    
Payments of lease liabilities (7,596)    
Net cash and cash equivalents provided by (used in) financing activities (7,596)    
Minera Yanacocha SRL and subsidiary [Member] | IFRS 16 [Member]      
Disclosure of basis for preparation, consolidation and accounting policies [Line Items]      
Short-term and low-value lease payments (270)    
Interest paid (26)    
Net cash and cash equivalents provided by operating activities $ (296)