CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (unaudited) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Jun. 25, 2022	Jun. 26, 2021	Jun. 25, 2022	Jun. 26, 2021
Statement of Comprehensive Income [Abstract]
Net (loss) income	$ (2,535)	$ (26,021)	$ 193,865	$ 139,172
Other comprehensive income:
Amortization of net actuarial losses and prior service credits into earnings	293	593	881	1,779
Recognition in earnings of net actuarial loss for pension settlement	634	142	634	712
Other comprehensive income	927	735	1,515	2,491
Total comprehensive (loss) income	$ (1,608)	$ (25,286)	$ 195,380	$ 141,663