Borrowings (Summary Of Long-Term Borrowings) (Details) $ in Thousands, R in Millions	12 Months Ended
	Jun. 30, 2024 USD ($)	Jun. 30, 2024 ZAR (R)	Jun. 30, 2023 USD ($)	Jun. 30, 2022 USD ($)	Jun. 30, 2024 ZAR (R)
Debt Instrument [Line Items]
Included in current	$ 3,878		$ 3,663	$ 141,646
Long-term borrowings	139,308		129,455
Beginning Balance	133,118
Utilized	23,728		24,355	78,851
Repaid	(20,073)		(17,512)	(5,581)
Non-refundable fees paid	0		(600)
Non-refundable Fees amortized	447		863
Capitalized interest	7,214		5,078
Capitalized interest repaid	(6,109)		(514)
Foreign currency adjustment	4,861		(20,198)
Ending Balance	143,186		133,118
Unamortized fees	(460)
Due within 2 years	62,872
Due within 3 years	20,532
Due within 4 years	56,253
Due within 5 years	$ 111
JIBAR [Member]
Debt Instrument [Line Items]
Debt instrument variable interest rate	8.40%	8.40%
Prime Rate [Member]
Debt Instrument [Line Items]
Debt instrument variable interest rate	11.75%	11.75%
G & H Facilities [Member]
Debt Instrument [Line Items]
Included in current	$ 0		0	63,354
Long-term borrowings	56,151		48,965
Beginning Balance	48,965
Utilized	16,445		0
Repaid	(12,515)		(10,543)
Non-refundable fees paid	0		(500)
Non-refundable Fees amortized	351		762
Capitalized interest	7,214		5,078
Capitalized interest repaid	(6,109)		(514)
Foreign currency adjustment	1,800		(8,672)
Ending Balance	56,151		48,965
Unamortized fees	(260)
Due within 2 years	56,411
Due within 3 years	0
Due within 4 years	0
Due within 5 years	$ 0
Interest rates	13.10%				13.10%
Base rate	8.35%				8.35%
G & H Facilities [Member] | Facility Agreement Scenario 1 [Member]
Debt Instrument [Line Items]
Line Of Credit | R					R 800.0
G & H Facilities [Member] | Facility Agreement Scenario 3 [Member]
Debt Instrument [Line Items]
Line Of Credit | R					350.0
G & H Facilities [Member] | JIBAR [Member]
Debt Instrument [Line Items]
Debt instrument variable interest rate	4.75%	4.75%
G & H Facilities [Member] | JIBAR [Member] | Facility Agreement Scenario 1 [Member]
Debt Instrument [Line Items]
Debt instrument variable interest rate	5.50%	5.50%
Line Of Credit | R					800.0
G & H Facilities [Member] | JIBAR [Member] | Facility Agreement Scenario 2 [Member]
Debt Instrument [Line Items]
Debt instrument variable interest rate	4.25%	4.25%
Line Of Credit | R					800.0
G & H Facilities [Member] | JIBAR [Member] | Facility Agreement Scenario 3 [Member]
Debt Instrument [Line Items]
Debt instrument variable interest rate	2.50%	2.50%
Line Of Credit | R					350.0
G & H Facilities [Member] | Maximum [Member] | Facility Agreement Scenario 2 [Member]
Debt Instrument [Line Items]
Line Of Credit | R					800.0
G & H Facilities [Member] | Minimum [Member] | JIBAR [Member] | Facility Agreement Scenario 2 [Member]
Debt Instrument [Line Items]
Line Of Credit | R					R 350.0
A & B Facilities [Member]
Debt Instrument [Line Items]
Included in current	$ 0		0	64,472
Long-term borrowings	66,815		64,436
Beginning Balance	64,436
Utilized	0		10,947
Repaid	0		(2,151)
Non-refundable fees paid	0		0
Non-refundable Fees amortized	48		57
Capitalized interest	0		0
Capitalized interest repaid	0		0
Foreign currency adjustment	2,331		(8,889)
Ending Balance	66,815		64,436
Unamortized fees	(180)
Due within 2 years	3,438
Due within 3 years	7,563
Due within 4 years	55,994
Due within 5 years	$ 0
Interest rates	12.10%				12.10%
Base rate	8.35%				8.35%
A & B Facilities [Member] | JIBAR [Member]
Debt Instrument [Line Items]
Interest rates	3.75%				3.75%
Debt instrument variable interest rate	3.75%	3.75%
CCC/ K2020 [Member]
Debt Instrument [Line Items]
Included in current	$ 0		0	8,346
Long-term borrowings	11,841		11,802
Beginning Balance	11,802
Utilized	2,915		7,377
Repaid	(3,353)		(2,149)
Non-refundable fees paid	0		(100)
Non-refundable Fees amortized	48		44
Capitalized interest	0		0
Capitalized interest repaid	0		0
Foreign currency adjustment	429		(1,716)
Ending Balance	11,841		11,802
Unamortized fees	(20)
Due within 2 years	0
Due within 3 years	11,861
Due within 4 years	0
Due within 5 years	$ 0
Interest rates	12.70%				12.70%
Base rate	11.75%				11.75%
CCC/ K2020 [Member] | JIBAR [Member]
Debt Instrument [Line Items]
Debt instrument variable interest rate	0.95%	0.95%
CCC/ K2020 [Member] | Prime Rate [Member]
Debt Instrument [Line Items]
Interest rates	0.95%				0.95%
Asset Backed Facility [Member]
Debt Instrument [Line Items]
Included in current	$ 3,878		3,663	$ 5,474
Long-term borrowings	4,501		4,252
Beginning Balance	7,915
Utilized	4,368		6,031
Repaid	(4,205)		(2,669)
Non-refundable fees paid	0		0
Non-refundable Fees amortized	0		0
Capitalized interest	0		0
Capitalized interest repaid	0		0
Foreign currency adjustment	301		(921)
Ending Balance	8,379		$ 7,915
Unamortized fees	0
Due within 2 years	3,023
Due within 3 years	1,108
Due within 4 years	259
Due within 5 years	$ 111
Interest rates	12.50%				12.50%
Base rate	11.75%				11.75%
Asset Backed Facility [Member] | JIBAR [Member]
Debt Instrument [Line Items]
Debt instrument variable interest rate	0.75%	0.75%
Asset Backed Facility [Member] | Prime Rate [Member]
Debt Instrument [Line Items]
Interest rates	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]
Debt instrument variable interest rate	3.00%	3.00%
Facility G [Member] | JIBAR [Member] | Scenario z [Member]
Debt Instrument [Line Items]
Debt instrument variable interest rate	3.50%	3.50%
Facility G [Member] | JIBAR [Member] | In Event Of Default [Member]
Debt Instrument [Line Items]
Interest rates	2.00%				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%				2.00%
Facility H [Member] | JIBAR [Member] | In Event Of Default [Member]
Debt Instrument [Line Items]
Interest rates	2.00%				2.00%