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CONCENTRATION OF RISK: (Tables)
12 Months Ended
Dec. 31, 2022
CONCENTRATION OF RISK:  
Schedule of concentration risk for cash equivalents and short- term investments

$ in

% of total

% in one institution

 

Country

    

million

    

cash (1)

    

of country

    

of total cash

 

United States

$

1,903.8

 

83.6

%  

12.4

%  

10.3

%

Switzerland

227.2

10.0

%  

100.0

%  

10.0

%

Peru

 

41.6

 

1.8

%  

75.1

%  

1.4

%

Mexico

 

105.4

 

4.6

%  

56.4

%  

2.6

%

Total cash and short-term investment

$

2,278.0

 

100.0

%  

(1)96.4% of the Company’s cash is in U.S. dollars.

Schedule of company's largest customers as percentage of accounts receivable and total sales

    

2022

    

2021

    

2020

 

Accounts receivable trade as of December 31, 

Five largest customers

 

34.2

%  

31.3

%  

35.3

%

Largest customer

 

10.4

%  

11.8

%  

12.9

%

Total sales in year

Five largest customers

 

25.7

%  

25.0

%  

28.1

%

Largest customer

 

6.8

%  

7.2

%  

10.0

%