XML 158 R140.htm IDEA: XBRL DOCUMENT v3.21.1
FINANCIAL RISK MANAGEMENT (Financial assets and liabilities at fair value) (Details) - USD ($)
$ in Thousands
Dec. 31, 2020
Dec. 31, 2019
Disclosure of fair value measurement of assets [line items]    
Financial assets, at fair value $ 496,832 $ 239,876
Financial liabilities, at fair value 6,358 3,024
Level 1    
Disclosure of fair value measurement of assets [line items]    
Financial assets, at fair value 492,631 238,680
Financial liabilities, at fair value 0 0
Level 2    
Disclosure of fair value measurement of assets [line items]    
Financial assets, at fair value 1,572 1,196
Financial liabilities, at fair value 6,358 3,024
Level 3    
Disclosure of fair value measurement of assets [line items]    
Financial assets, at fair value 2,629 0
Financial liabilities, at fair value 0 0
Derivatives    
Disclosure of fair value measurement of assets [line items]    
Financial liabilities, at fair value 6,358 3,024
Derivatives | Level 1    
Disclosure of fair value measurement of assets [line items]    
Financial liabilities, at fair value 0 0
Derivatives | Level 2    
Disclosure of fair value measurement of assets [line items]    
Financial liabilities, at fair value 6,358 3,024
Derivatives | Level 3    
Disclosure of fair value measurement of assets [line items]    
Financial liabilities, at fair value 0 0
Cash and cash equivalents    
Disclosure of fair value measurement of assets [line items]    
Financial assets, at fair value 259,020 199,877
Cash and cash equivalents | Level 1    
Disclosure of fair value measurement of assets [line items]    
Financial assets, at fair value 259,020 199,877
Cash and cash equivalents | Level 2    
Disclosure of fair value measurement of assets [line items]    
Financial assets, at fair value 0 0
Cash and cash equivalents | Level 3    
Disclosure of fair value measurement of assets [line items]    
Financial assets, at fair value 0 0
Other investments    
Disclosure of fair value measurement of assets [line items]    
Financial assets, at fair value 236,240 38,803
Other investments | Level 1    
Disclosure of fair value measurement of assets [line items]    
Financial assets, at fair value 233,611 38,803
Other investments | Level 2    
Disclosure of fair value measurement of assets [line items]    
Financial assets, at fair value 0 0
Other investments | Level 3    
Disclosure of fair value measurement of assets [line items]    
Financial assets, at fair value 2,629 0
Derivatives    
Disclosure of fair value measurement of assets [line items]    
Financial assets, at fair value 1,572 1,196
Derivatives | Level 1    
Disclosure of fair value measurement of assets [line items]    
Financial assets, at fair value 0 0
Derivatives | Level 2    
Disclosure of fair value measurement of assets [line items]    
Financial assets, at fair value 1,572 1,196
Derivatives | Level 3    
Disclosure of fair value measurement of assets [line items]    
Financial assets, at fair value $ 0 $ 0