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Changes in Carrying Amount of Goodwill (Detail) $ in Thousands	6 Months Ended
	Dec. 31, 2019 USD ($)
Goodwill [Line Items]
Balance-beginning of period	$ 319,778
Goodwill acquired	774,130
Foreign currency translation	2,783
Balance-end of period	1,096,691
Compound Semiconductors
Goodwill [Line Items]
Balance-beginning of period	185,721
Goodwill acquired	61,085
Foreign currency translation	2,482
Balance-end of period	249,288
Photonic Solutions
Goodwill [Line Items]
Balance-beginning of period	134,057
Goodwill acquired	713,045
Foreign currency translation	301
Balance-end of period	$ 847,403

X

- Definition

Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 20
-Section 45
-Paragraph 5
-URI http://asc.fasb.org/extlink&oid=77989000&loc=SL49117168-202975

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-SubTopic 20
-Section 45
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-SubTopic 20
-Section 50
-Paragraph 1
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- Definition

Amount of foreign currency translation gain (loss) which increases (decreases) an asset representing future economic benefits from other assets acquired in a business combination that are not individually identified and separately recognized.

+ References

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