Goodwill and Other Intangible Assets - Changes in Carrying Amount of Goodwill (Details) - USD ($) $ in Thousands	12 Months Ended
	Jun. 30, 2021	Jun. 30, 2020
Goodwill [Roll Forward]
Balance-beginning of period	$ 1,239,009	$ 319,778
Goodwill acquired	54,634	919,192
Finisar measurement period adjustments	(4,901)
Foreign currency translation	7,985	39
Balance-end of period	1,296,727	1,239,009
Photonic Solutions
Goodwill [Roll Forward]
Balance-beginning of period	1,052,494	134,057
Goodwill acquired	0	919,192
Finisar measurement period adjustments	(4,901)
Foreign currency translation	5,435	(755)
Balance-end of period	1,053,028	1,052,494
Compound Semiconductors
Goodwill [Roll Forward]
Balance-beginning of period	186,515	185,721
Goodwill acquired	54,634	0
Finisar measurement period adjustments	0
Foreign currency translation	2,550	794
Balance-end of period	$ 243,699	$ 186,515