Revenue from Contracts with Customers - Summary of Disaggregated Revenue by Market and Product (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Jun. 30, 2021	Mar. 31, 2021	Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2019
Disaggregation of Revenue [Line Items]
Revenues	$ 808,006	$ 783,232	$ 786,569	$ 728,084	$ 746,290	$ 627,041	$ 666,331	$ 340,409	$ 3,105,891	$ 2,380,071	$ 1,362,496
Unallocated & Other
Disaggregation of Revenue [Line Items]
Revenues										22,051
Photonic Solutions | Operating Segments
Disaggregation of Revenue [Line Items]
Revenues									2,038,284	1,536,790	638,889
Compound Semiconductors | Operating Segments
Disaggregation of Revenue [Line Items]
Revenues									1,067,607	821,230	723,607
Industrial
Disaggregation of Revenue [Line Items]
Revenues									325,879	293,281
Industrial | Operating Segments
Disaggregation of Revenue [Line Items]
Revenues											342,043
Industrial | Photonic Solutions | Operating Segments
Disaggregation of Revenue [Line Items]
Revenues									50,181	52,806	58,621
Industrial | Compound Semiconductors | Operating Segments
Disaggregation of Revenue [Line Items]
Revenues									275,698	240,475	283,422
Communications
Disaggregation of Revenue [Line Items]
Revenues									2,052,666	1,584,461
Communications | Operating Segments
Disaggregation of Revenue [Line Items]
Revenues											619,232
Communications | Unallocated & Other
Disaggregation of Revenue [Line Items]
Revenues										21,557
Communications | Photonic Solutions | Operating Segments
Disaggregation of Revenue [Line Items]
Revenues									1,917,697	1,437,377	526,420
Communications | Compound Semiconductors | Operating Segments
Disaggregation of Revenue [Line Items]
Revenues									134,969	125,527	92,812
Aerospace & Defense
Disaggregation of Revenue [Line Items]
Revenues									201,845	175,097
Aerospace & Defense | Operating Segments
Disaggregation of Revenue [Line Items]
Revenues											152,702
Aerospace & Defense | Photonic Solutions | Operating Segments
Disaggregation of Revenue [Line Items]
Revenues									0	0	0
Aerospace & Defense | Compound Semiconductors | Operating Segments
Disaggregation of Revenue [Line Items]
Revenues									201,845	175,097	152,702
Consumer
Disaggregation of Revenue [Line Items]
Revenues									286,457	131,341
Consumer | Operating Segments
Disaggregation of Revenue [Line Items]
Revenues											49,126
Consumer | Unallocated & Other
Disaggregation of Revenue [Line Items]
Revenues										494
Consumer | Photonic Solutions | Operating Segments
Disaggregation of Revenue [Line Items]
Revenues									9,138	4,620	2,300
Consumer | Compound Semiconductors | Operating Segments
Disaggregation of Revenue [Line Items]
Revenues									277,319	126,227	46,826
Other
Disaggregation of Revenue [Line Items]
Revenues									239,044	195,891
Other | Operating Segments
Disaggregation of Revenue [Line Items]
Revenues											199,393
Other | Photonic Solutions | Operating Segments
Disaggregation of Revenue [Line Items]
Revenues									61,268	41,987	51,548
Other | Compound Semiconductors | Operating Segments
Disaggregation of Revenue [Line Items]
Revenues									$ 177,776	$ 153,904	$ 147,845