Segment Reporting - Schedule of Financial Information by Segment (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2024	Dec. 31, 2023
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Revenues	$ 1,434,665	$ 1,131,434	$ 2,782,800	$ 2,184,517
Share-based compensation	(41,012)	(27,252)	(76,490)	(71,776)
Restructuring charges (recoveries)			(18,370)	(2,639)
Interest expense	(64,278)	(74,678)	(130,922)	(147,936)
Other income, net	(55,816)	(5,386)	(66,565)	(11,655)
Earnings (loss) before income taxes	128,404	(37,407)	147,707	(125,704)
Expenditures for property, plant, and equipment	105,683	91,470	197,667	153,667
2023 Restructuring Plan
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Restructuring charges (recoveries)	(8,000)	2,000	(32,000)	(1,000)
Networking
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Revenues	815,913	524,235	1,578,785	997,084
Networking | 2023 Restructuring Plan
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Restructuring charges (recoveries)	(3,000)	3,000	(4,000)	5,000
Materials
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Revenues	243,475	253,678	480,902	498,318
Materials | 2023 Restructuring Plan
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Restructuring charges (recoveries)	(3,000)	(2,000)	(26,000)	(7,000)
Lasers
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Revenues	375,277	353,521	723,113	689,115
Lasers | 2023 Restructuring Plan
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Restructuring charges (recoveries)	(2,000)		(2,000)
Operating Segments
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Revenues	1,434,665	1,131,434	2,782,800	2,184,517
Segment profit	314,906	214,118	605,659	370,626
Operating Segments | Networking
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Revenues	815,913	524,235	1,578,785	997,084
Segment profit	153,269	95,350	289,175	156,063
Expenditures for property, plant, and equipment	70,211	36,374	118,897	53,867
Operating Segments | Materials
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Revenues	243,475	253,678	480,902	498,318
Segment profit	74,117	56,220	165,225	106,322
Expenditures for property, plant, and equipment	30,703	54,511	64,499	95,023
Operating Segments | Lasers
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Revenues	375,277	353,521	723,113	689,115
Segment profit	87,520	62,548	151,259	108,241
Expenditures for property, plant, and equipment	4,769	585	14,271	4,777
Unallocated
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Revenues	134,024	107,226	282,183	208,494
Intersegment
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Revenues	0	0	0	0
Intersegment | Networking
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Revenues	(12,584)	(9,979)	(27,011)	(22,866)
Intersegment | Materials
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Revenues	(119,122)	(96,042)	(251,290)	(183,784)
Intersegment | Lasers
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Revenues	(2,318)	(1,205)	(3,882)	(1,844)
Corporate and shared services
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Corporate and centralized function costs	(49,959)	(61,669)	(123,061)	(107,204)
Share-based compensation	(41,012)	(27,252)	(76,490)	(71,776)
Restructuring charges (recoveries)	(8,021)	1,570	(32,385)	(1,448)
Integration, site consolidated and other costs	(7,332)	(23,376)	(18,081)	(35,454)
Amortization of intangibles	(71,716)	(71,507)	(143,578)	(144,168)
Interest expense	(64,278)	(74,678)	(130,922)	(147,936)
Other income, net	55,816	5,387	66,565	11,656
Earnings (loss) before income taxes	128,404	(37,407)	147,707	(125,704)
Consulting costs related to projects to integrate recent acquisitions	4,000	16,000	15,000	23,000
Corporate and shared services | 2023 Restructuring Plan
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Manufacturing inefficiencies, employee severance and retention costs and duplicative labor	$ 3,000	$ 4,000	$ 2,000	$ 6,000