Condensed Consolidated Statement of Comprehensive Income (Loss) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Mar. 28, 2020	Mar. 30, 2019	Mar. 28, 2020	Mar. 30, 2019
Net income	$ 4,882	$ 40,885	$ 43,227	$ 78,837
Other comprehensive income (loss), net of tax:
Change in foreign currency translation adjustments	(2,887)	(235)	(2,170)	(487)
Derivative financial instruments:
Change in net unrealized amount	(8,306)	(2,478)	(4,926)	(8,975)
Amount reclassified into net income	538	(2,645)	343	(235)
Defined benefit plans:
Changes in unrecognized net actuarial losses and unrecognized transition costs	415	109	228	399
Amortization of actuarial losses and transition costs	102	237	646	435
Total other comprehensive loss	(10,138)	(5,012)	(5,879)	(8,863)
Comprehensive income (loss)	$ (5,256)	$ 35,873	$ 37,348	$ 69,974