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Borrowings (Summary Of Long-Term Borrowings) (Details)
$ in Thousands, R in Millions
3 Months Ended
Sep. 30, 2022
USD ($)
Sep. 30, 2022
ZAR (R)
Sep. 30, 2021
USD ($)
Jun. 30, 2022
USD ($)
Debt Instrument [Line Items]        
Included in current $ 6,365     $ 6,804 [1]
Included in long-term 121,435     134,842 [1]
Beginning Balance 141,646      
Utilized 1,059   $ 0  
Repaid (1,580)   $ 0  
Non-refundable fees paid 0      
Non-refundable Fees amortized 0      
Foreign currency adjustment (13,325)      
Ending Balance 127,800      
Unamortized fees (954)      
Due within 2 years 72,652      
Due within 3 years 6,697      
Due within 4 years 7,341      
Due within 5 years 35,699      
G & H Facilities [Member]        
Debt Instrument [Line Items]        
Included in current 0     0
Included in long-term 57,501     63,354
Beginning Balance 63,354      
Utilized 0      
Repaid 0      
Non-refundable fees paid 0      
Non-refundable Fees amortized 0      
Foreign currency adjustment (5,853)      
Ending Balance 57,501      
Unamortized fees (678)      
Due within 2 years 58,179      
Due within 3 years 0      
Due within 4 years 0      
Due within 5 years $ 0      
Base rate 6.467%      
G & H Facilities [Member] | Maximum [Member]        
Debt Instrument [Line Items]        
Interest rates 9.50%      
G & H Facilities [Member] | Minimum [Member]        
Debt Instrument [Line Items]        
Interest rates 8.50%      
A & B Facilities [Member]        
Debt Instrument [Line Items]        
Included in current $ 4,164     4,604
Included in long-term 53,118     59,868
Beginning Balance 64,472      
Utilized 0      
Repaid (1,067)      
Non-refundable fees paid 0      
Non-refundable Fees amortized 0      
Foreign currency adjustment (6,123)      
Ending Balance 57,282      
Unamortized fees (276)      
Due within 2 years 4,510      
Due within 3 years 5,899      
Due within 4 years 7,286      
Due within 5 years $ 35,699      
Interest rates 10.22%      
Base rate 6.467%      
A & B Facilities [Member] | JIBAR [Member]        
Debt Instrument [Line Items]        
Interest rates 3.75%      
Debt instrument variable interest rate 3.75% 3.75%    
K2020 Facilities [Member]        
Debt Instrument [Line Items]        
Included in current $ 0     0
Included in long-term 8,007     8,346
Beginning Balance 8,346      
Utilized 476      
Repaid 0      
Non-refundable fees paid 0      
Non-refundable Fees amortized 0      
Foreign currency adjustment (815)      
Ending Balance 8,007      
Unamortized fees 0      
Due within 2 years 8,007      
Due within 3 years 0      
Due within 4 years 0      
Due within 5 years $ 0      
Interest rates 11.00%      
Base rate 9.75%      
K2020 Facilities [Member] | Prime Rate [Member]        
Debt Instrument [Line Items]        
Interest rates 1.25%      
Debt instrument variable interest rate 1.25% 1.25%    
Asset Backed Facility [Member]        
Debt Instrument [Line Items]        
Included in current $ 2,201     2,200
Included in long-term 2,809     $ 3,274
Beginning Balance 5,474      
Utilized 583      
Repaid (513)      
Non-refundable fees paid 0      
Non-refundable Fees amortized 0      
Foreign currency adjustment (534)      
Ending Balance 5,010      
Unamortized fees 0      
Due within 2 years 1,956      
Due within 3 years 798      
Due within 4 years 55      
Due within 5 years $ 0      
Interest rates 10.50%      
Base rate 9.75%      
Asset Backed Facility [Member] | Prime Rate [Member]        
Debt Instrument [Line Items]        
Interest rates 1.00%      
Debt instrument variable interest rate 0.75% 0.75%    
Facility G [Member] | JIBAR [Member]        
Debt Instrument [Line Items]        
Debt instrument variable interest rate 3.00% 3.00%    
Facility G [Member] | JIBAR [Member] | Scenario x [Member]        
Debt Instrument [Line Items]        
Debt instrument variable interest rate 2.50% 2.50%    
Facility G [Member] | JIBAR [Member] | Scenario y [Member]        
Debt Instrument [Line Items]        
Interest rates 3.00%      
Facility G [Member] | JIBAR [Member] | Scenario z [Member]        
Debt Instrument [Line Items]        
Interest rates 3.50%      
Facility G [Member] | JIBAR [Member] | In Event Of Default [Member]        
Debt Instrument [Line Items]        
Interest rates 2.00%      
Facility G [Member] | Maximum [Member] | JIBAR [Member] | Scenario x [Member]        
Debt Instrument [Line Items]        
Ending Balance | R   R 250.0    
Facility G [Member] | Maximum [Member] | JIBAR [Member] | Scenario y [Member]        
Debt Instrument [Line Items]        
Ending Balance | R   450.0    
Facility G [Member] | Minimum [Member] | JIBAR [Member] | Scenario y [Member]        
Debt Instrument [Line Items]        
Ending Balance | R   250.0    
Facility G [Member] | Minimum [Member] | JIBAR [Member] | Scenario z [Member]        
Debt Instrument [Line Items]        
Ending Balance | R   R 450.0    
Facility H [Member] | JIBAR [Member]        
Debt Instrument [Line Items]        
Interest rates 2.00%      
Facility H [Member] | JIBAR [Member] | In Event Of Default [Member]        
Debt Instrument [Line Items]        
Interest rates 2.00%      
[1] (A) – Derived from audited financial statements