Borrowings (Summary Of Long-Term Borrowings) (Details) $ in Thousands, R in Millions	3 Months Ended		6 Months Ended
	Dec. 31, 2023 USD ($)	Dec. 31, 2022 USD ($)	Dec. 31, 2023 USD ($)	Dec. 31, 2022 USD ($)	Dec. 31, 2023 ZAR (R)	Jun. 30, 2023 USD ($)
Debt Instrument [Line Items]
Included in current	$ 3,429		$ 3,429			$ 3,663	[1]
Long-term borrowings	139,337		139,337			129,455	[1]
Beginning Balance			133,118
Facilities utilized	8,557	$ 9,083	11,028	$ 10,142
Facilities repaid	(3,184)	$ (1,688)	(5,813)	$ (3,268)
Non-refundable fees paid			0
Non-refundable Fees amortized			316
Capitalized interest			3,643
Capitalized interest repaid			(3,508)
Foreign currency adjustment			3,982
Ending Balance	142,766		142,766
Unamortized fees	(591)		(591)
Due within 2 years	3,797		3,797
Due within 3 years	76,302		76,302
Due within 4 years	59,829		59,829
Due within 5 years	0		$ 0
JIBAR [Member]
Debt Instrument [Line Items]
Debt instrument variable interest rate			8.40%
Prime Rate [Member]
Debt Instrument [Line Items]
Debt instrument variable interest rate			11.75%
G & H Facilities [Member]
Debt Instrument [Line Items]
Included in current	0		$ 0			0
Long-term borrowings	57,119		57,119			48,965
Beginning Balance			48,965
Facilities utilized			8,072
Facilities repaid			(1,847)
Non-refundable fees paid			0
Non-refundable Fees amortized			267
Capitalized interest			3,643
Capitalized interest repaid			(3,508)
Foreign currency adjustment			1,527
Ending Balance	57,119		57,119
Unamortized fees	(344)		(344)
Due within 2 years	0		0
Due within 3 years	57,463		57,463
Due within 4 years	0		0
Due within 5 years	$ 0		$ 0
Interest rates	13.90%		13.90%		13.90%
Base rate	8.40%		8.40%		8.40%
Debt instrument variable interest rate			5.50%
G & H Facilities [Member] | Facility Agreement Scenario 1 [Member]
Debt Instrument [Line Items]
Line Of Credit | R					R 800
G & H Facilities [Member] | Facility Agreement Scenario 3 [Member]
Debt Instrument [Line Items]
Line Of Credit	$ 350,000		$ 350,000
G & H Facilities [Member] | JIBAR [Member] | Facility Agreement Scenario 1 [Member]
Debt Instrument [Line Items]
Debt instrument variable interest rate			5.50%
G & H Facilities [Member] | JIBAR [Member] | Facility Agreement Scenario 2 [Member]
Debt Instrument [Line Items]
Debt instrument variable interest rate			4.25%
G & H Facilities [Member] | JIBAR [Member] | Facility Agreement Scenario 3 [Member]
Debt Instrument [Line Items]
Debt instrument variable interest rate			2.50%
G & H Facilities [Member] | Maximum [Member] | Facility Agreement Scenario 2 [Member]
Debt Instrument [Line Items]
Line Of Credit | R					800
G & H Facilities [Member] | Minimum [Member] | Facility Agreement Scenario 2 [Member]
Debt Instrument [Line Items]
Line Of Credit | R					R 350
A & B Facilities [Member]
Debt Instrument [Line Items]
Included in current	0		$ 0			0
Long-term borrowings	66,361		66,361			64,436
Beginning Balance			64,436
Facilities utilized			0
Facilities repaid			0
Non-refundable fees paid			0
Non-refundable Fees amortized			24
Capitalized interest			0
Capitalized interest repaid			0
Foreign currency adjustment			1,901
Ending Balance	66,361		66,361
Unamortized fees	(204)		(204)
Due within 2 years	0		0
Due within 3 years	6,832		6,832
Due within 4 years	59,733		59,733
Due within 5 years	$ 0		$ 0
Interest rates	12.15%		12.15%		12.15%
Base rate	8.40%		8.40%		8.40%
Debt instrument variable interest rate			3.75%
A & B Facilities [Member] | JIBAR [Member]
Debt Instrument [Line Items]
Debt instrument variable interest rate			3.75%
CCC Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Included in current	$ 0		$ 0			0
Long-term borrowings	10,698		10,698			11,802
Beginning Balance			11,802
Facilities utilized			537
Facilities repaid			(1,968)
Non-refundable fees paid			0
Non-refundable Fees amortized			25
Capitalized interest			0
Capitalized interest repaid			0
Foreign currency adjustment			302
Ending Balance	10,698		10,698
Unamortized fees	(43)		(43)
Due within 2 years	0		0
Due within 3 years	10,741		10,741
Due within 4 years	0		0
Due within 5 years	$ 0		$ 0
Interest rates	12.70%		12.70%		12.70%
Base rate	11.75%		11.75%		11.75%
Debt instrument variable interest rate			0.95%
CCC Revolving Credit Facility [Member] | Prime Rate [Member]
Debt Instrument [Line Items]
Debt instrument variable interest rate			0.95%
Asset Backed Facility [Member]
Debt Instrument [Line Items]
Included in current	$ 3,429		$ 3,429			3,663
Long-term borrowings	5,159		5,159			$ 4,252
Beginning Balance			7,915
Facilities utilized			2,419
Facilities repaid			(1,998)
Non-refundable fees paid			0
Non-refundable Fees amortized			0
Capitalized interest			0
Capitalized interest repaid			0
Foreign currency adjustment			252
Ending Balance	8,588		8,588
Unamortized fees	0		0
Due within 2 years	3,797		3,797
Due within 3 years	1,266		1,266
Due within 4 years	96		96
Due within 5 years	$ 0		$ 0
Interest rates	12.50%		12.50%		12.50%
Base rate	11.75%		11.75%		11.75%
Debt instrument variable interest rate			0.75%
Asset Backed Facility [Member] | Prime Rate [Member]
Debt Instrument [Line Items]
Debt instrument variable interest rate			0.75%

[1] (A) – Derived from audited financial statements