Segment Reporting - Financial Information of Company's Operation by Segment (Detail) - USD ($) $ in Thousands	3 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Jun. 30, 2022
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Revenues	$ 1,344,570	$ 795,111
Inter-segment revenues	0	0
Operating income (loss)	42,476	95,050
Interest expense	(61,889)	(12,191)
Other income (expense), net	(31,605)	7,582
Income tax expense (benefit)	(12,320)	15,977
Net earnings (loss)	(38,698)	74,464
Depreciation and amortization	147,286	69,692
Expenditures for property, plant & equipment	138,990	47,565
Segment assets	13,830,559		$ 7,844,846
Goodwill	5,284,591		1,285,759
Unallocated & Other
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Revenues	0	0
Inter-segment revenues	(113,960)	(94,932)
Operating income (loss)	0	(11,167)
Interest expense	0	0
Other income (expense), net	0	0
Income tax expense (benefit)	0	0
Net earnings (loss)	0	0
Depreciation and amortization	0	0
Expenditures for property, plant & equipment	0	0
Segment assets	0
Goodwill	0
Networking
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Goodwill	1,009,078		1,048,743
Networking | Operating Segments
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Revenues	596,548	531,013
Inter-segment revenues	18,740	32,169
Operating income (loss)	90,982	59,439
Interest expense	0	0
Other income (expense), net	0	0
Income tax expense (benefit)	0	0
Net earnings (loss)	0	0
Depreciation and amortization	42,774	41,833
Expenditures for property, plant & equipment	43,830	24,796
Segment assets	3,491,637
Goodwill	1,009,078
Materials
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Goodwill	270,197		237,016
Materials | Operating Segments
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Revenues	355,644	264,098
Inter-segment revenues	95,054	62,763
Operating income (loss)	75,335	46,778
Interest expense	0	0
Other income (expense), net	0	0
Income tax expense (benefit)	0	0
Net earnings (loss)	0	0
Depreciation and amortization	26,527	27,859
Expenditures for property, plant & equipment	74,898	$ 22,770
Segment assets	2,251,544
Goodwill	270,197
Lasers
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Goodwill	4,005,316		$ 0
Lasers | Operating Segments
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Revenues	392,378
Inter-segment revenues	166
Operating income (loss)	(123,841)
Interest expense	0
Other income (expense), net	0
Income tax expense (benefit)	0
Net earnings (loss)	0
Depreciation and amortization	77,985
Expenditures for property, plant & equipment	20,262
Segment assets	8,087,378
Goodwill	$ 4,005,316