Segment Reporting - Financial Information of Company's Operations by Segment (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2022	Dec. 31, 2021	Jun. 30, 2022
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Revenues	$ 1,370,285	$ 806,819	$ 2,714,855	$ 1,601,930
Inter-segment revenues	0	0	0	0
Operating income (loss)	8,246	98,222	50,722	193,272
Interest expense	(70,904)	(17,062)	(132,793)	(29,253)
Other income (expense), net	(3,696)	(1,806)	(35,301)	5,776
Income taxes	(21,282)	11,697	(33,602)	27,674
Net earnings (loss)	(45,072)	67,657	(83,770)	142,121
Depreciation and amortization	169,909	71,026	317,195	140,719
Expenditures for property, plant & equipment	106,864	54,122	245,854	101,689
Segment assets	14,108,894		14,108,894		$ 7,844,846
Goodwill	4,426,841		4,426,841		1,285,759
Unallocated & Other
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Revenues	0	0	0	0
Inter-segment revenues	(104,391)	(101,646)	(218,351)	(196,578)
Operating income (loss)	0	(8,740)	0	(19,907)
Interest expense	0	0	0	0
Other income (expense), net	0	0	0	0
Income taxes	0	0	0	0
Net earnings (loss)	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
Networking
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Goodwill	1,011,644		1,011,644		1,048,743
Networking | Operating Segments
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Revenues	608,680	516,541	1,205,228	1,047,554
Inter-segment revenues	17,630	24,552	36,370	56,721
Operating income (loss)	90,039	50,424	181,021	109,863
Interest expense	0	0	0	0
Other income (expense), net	0	0	0	0
Income taxes	0	0	0	0
Net earnings (loss)	0	0	0	0
Depreciation and amortization	40,241	42,545	83,015	84,379
Expenditures for property, plant & equipment	30,383	10,620	74,213	35,416
Segment assets	3,518,319		3,518,319
Goodwill	1,011,644		1,011,644
Materials
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Goodwill	273,268		273,268		237,016
Materials | Operating Segments
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Revenues	382,396	290,278	738,040	554,376
Inter-segment revenues	85,844	77,094	180,898	139,857
Operating income (loss)	81,472	56,538	156,807	103,316
Interest expense	0	0	0	0
Other income (expense), net	0	0	0	0
Income taxes	0	0	0	0
Net earnings (loss)	0	0	0	0
Depreciation and amortization	28,035	28,481	54,562	56,340
Expenditures for property, plant & equipment	61,474	$ 43,502	136,372	$ 66,273
Segment assets	2,248,600		2,248,600
Goodwill	273,268		273,268
Lasers
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Goodwill	3,141,929		3,141,929		$ 0
Lasers | Operating Segments
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Revenues	379,209		771,587
Inter-segment revenues	917		1,083
Operating income (loss)	(163,265)		(287,106)
Interest expense	0		0
Other income (expense), net	0		0
Income taxes	0		0
Net earnings (loss)	0		0
Depreciation and amortization	101,633		179,618
Expenditures for property, plant & equipment	15,007		35,269
Segment assets	8,341,975		8,341,975
Goodwill	$ 3,141,929		$ 3,141,929