Goodwill and Other Intangible Assets - Changes in Carrying Amount of Goodwill (Detail) $ in Thousands	6 Months Ended
	Dec. 31, 2020 USD ($)
Goodwill [Roll Forward]
Balance-beginning of period	$ 1,239,009
Goodwill acquired	51,216
Finisar measurement period adjustments	(4,901)
Foreign currency translation	7,060
Balance-end of period	1,292,384
Compound Semiconductors
Goodwill [Roll Forward]
Balance-beginning of period	1,052,494
Goodwill acquired	0
Finisar measurement period adjustments	(4,901)
Foreign currency translation	4,239
Balance-end of period	1,051,832
Photonic Solutions
Goodwill [Roll Forward]
Balance-beginning of period	186,515
Goodwill acquired	51,216
Finisar measurement period adjustments	0
Foreign currency translation	2,821
Balance-end of period	$ 240,552