Investments - Carrying Values for Publicly Traded and Privately Held Equity Securities (Details) - USD ($) $ in Thousands	Dec. 31, 2022	Jun. 30, 2022
Debt and Equity Securities, FV-NI [Line Items]
Initial total cost	$ 139,070	$ 130,570
Cumulative net gain (loss)	8,368	27,226
Carrying Value	147,438	157,796
Publicly traded equity securities
Debt and Equity Securities, FV-NI [Line Items]
Initial total cost	10,270	10,270
Cumulative net gain (loss)	9,055	20,531
Carrying Value	19,325	30,801
Privately held equity securities
Debt and Equity Securities, FV-NI [Line Items]
Initial total cost	128,800	120,300
Cumulative net gain (loss)	(687)	6,695
Carrying Value	$ 128,113	$ 126,995