Segments (Segment Sales By Market Type) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Mar. 28, 2026	Mar. 29, 2025	Mar. 28, 2026	Mar. 29, 2025
Segment Reporting
Net sales	$ 1,051,947	$ 934,022	$ 2,152,293	$ 1,841,904
Space And Defense
Segment Reporting
Net sales	313,593	270,184	637,871	517,968
Space And Defense | Space
Segment Reporting
Net sales	127,557	122,018	250,420	230,205
Space And Defense | Defense
Segment Reporting
Net sales	186,036	148,166	387,451	287,763
Military Aircraft
Segment Reporting
Net sales	235,489	213,849	482,900	427,269
Military Aircraft | Original Equipment Manufacturers
Segment Reporting
Net sales	183,524	165,166	361,180	331,373
Military Aircraft | Aftermarket
Segment Reporting
Net sales	51,965	48,683	121,720	95,896
Commercial Aircraft
Segment Reporting
Net sales	247,007	215,563	514,850	434,053
Commercial Aircraft | Original Equipment Manufacturers
Segment Reporting
Net sales	163,837	135,648	334,133	276,725
Commercial Aircraft | Aftermarket
Segment Reporting
Net sales	83,170	79,915	180,717	157,328
Industrial
Segment Reporting
Net sales	255,858	234,426	516,672	462,614
Industrial | Energy
Segment Reporting
Net sales	33,476	38,933	67,595	67,218
Industrial | Industrial Automation
Segment Reporting
Net sales	123,339	95,063	240,151	191,177
Industrial | Simulation and Test
Segment Reporting
Net sales	32,431	34,816	68,759	70,309
Industrial | Medical
Segment Reporting
Net sales	$ 66,612	$ 65,614	$ 140,167	$ 133,910