Segment Reporting - Financial Information of Company's Operation by Segment (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2021	Dec. 31, 2020	Jun. 30, 2021
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Revenues	$ 806,819	$ 786,569	$ 1,601,930	$ 1,514,653
Inter-segment revenues	0	0	0	0
Operating income (loss)	98,222	118,716	193,272	219,845
Interest expense	(17,062)	(15,585)	(29,253)	(32,799)
Other income (expense), net	(1,806)	3,153	5,776	(21,186)
Income taxes	(11,697)	(18,383)	(27,674)	(31,694)
Net earnings	67,657	87,900	142,121	134,166
Depreciation and amortization	71,026	67,200	140,718	131,886
Expenditures for property, plant & equipment	54,122	45,537	101,689	79,329
Segment assets	7,649,283		7,649,283		$ 6,512,650
Goodwill	1,293,167		1,293,167		1,296,727
Unallocated & Other
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Revenues	0	0	0	0
Inter-segment revenues	(101,646)	(73,253)	(196,578)	(147,556)
Operating income (loss)	(8,740)	0	(19,907)	0
Interest expense	0	0	0	0
Other income (expense), net	0	0	0	0
Income taxes	0	0	0	0
Net earnings	0	0	0	0
Depreciation and amortization	0	0	0	0
Expenditures for property, plant & equipment	0	0	0	0
Segment assets	0		0
Goodwill	0		0
Photonic Solutions
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Goodwill	1,052,038		1,052,038		1,053,028
Photonic Solutions | Operating Segments
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Revenues	524,969	482,879	1,060,992	980,606
Inter-segment revenues	9,377	8,441	25,940	15,657
Operating income (loss)	49,713	48,439	106,259	98,873
Interest expense	0	0	0	0
Other income (expense), net	0	0	0	0
Income taxes	0	0	0	0
Net earnings	0	0	0	0
Depreciation and amortization	42,850	39,764	84,986	78,451
Expenditures for property, plant & equipment	11,885	24,853	36,862	46,087
Segment assets	4,981,065		4,981,065
Goodwill	1,052,038		1,052,038
Compound Semiconductors
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Goodwill	241,129		241,129		$ 243,699
Compound Semiconductors | Operating Segments
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Revenues	281,850	303,690	540,938	534,047
Inter-segment revenues	92,269	64,812	170,638	131,899
Operating income (loss)	57,249	70,277	106,920	120,972
Interest expense	0	0	0	0
Other income (expense), net	0	0	0	0
Income taxes	0	0	0	0
Net earnings	0	0	0	0
Depreciation and amortization	28,176	27,437	55,732	53,435
Expenditures for property, plant & equipment	42,237	$ 20,684	64,827	$ 33,242
Segment assets	2,668,218		2,668,218
Goodwill	$ 241,129		$ 241,129