Income Taxes - Reconciliation of Income Taxes (Details) - USD ($) $ in Thousands	12 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2018
Effective Income Tax Rate Reconciliation, Amount [Abstract]
Income Taxes at U.S Statutory Rate	$ 412	$ 65,359	$ 77,286
State Income Taxes, Net of Federal Tax Benefits	1,283	289	2,975
US Income Tax Provided On International Income	12,422	7,347	1,010
Combined Tax Effects of International Income	10,583	162	(9,333)
Effective Income Tax Rate Reconciliation, Nondeductible Expense, Impairment Losses, Amount	5,651	0	0
Change in valuation allowance and other uncertain tax positions	755	(1,473)	(90,817)
Research and Development Credit	(4,093)	(3,911)	(3,141)
Change In Permanent Reinvestment Assertion	0	6,093	0
Combined effects of tax reform		(9,280)	86,044
Discrete Benefit for Swiss Tax Reform	(14,500)
Effective income tax rate reconciliation, Combined effects of U.S. CARES Act, Amount	(6,913)
Adjustment to deferred tax charges on intra-entity transfers	0	0	5,297
Other	1,407	(1,227)	660
Provision for income taxes	$ 7,007	$ 63,359	$ 69,981