Pension Plans and Other Postretirement Benefits - Additional Information (Details) - USD ($) $ in Thousands	3 Months Ended			9 Months Ended
	Jun. 25, 2022	Jun. 26, 2021	Mar. 27, 2021	Jun. 25, 2022	Jun. 26, 2021	Sep. 25, 2021
Components of net periodic benefit costs included in operating expenses [Abstract]
Contribution to defined pension benefit plan				$ 2,220	$ 5,255
Pension settlement charge				(634)	(712)
Estimated obligation due to full withdrawal multi employer pension plans	$ 22,766			22,766		$ 23,567
Defined Benefit Pension Plan [Member]
Components of net periodic benefit costs included in operating expenses [Abstract]
Defined benefit plan expected future benefit payments	3,330			3,330
Settlement threshold amount	2,238	$ 2,135	$ 2,135
Pension settlement charge	634	$ 142	$ 570	634	$ 712
Defined Benefit Pension Plan [Member] | Other, Net [Member]
Components of net periodic benefit costs included in operating expenses [Abstract]
Contribution to defined pension benefit plan				2,220
Post-Retirement Benefits [Member]
Components of net periodic benefit costs included in operating expenses [Abstract]
Defined benefit plan expected future benefit payments	$ 710			710
Post-Retirement Benefits [Member] | Other, Net [Member]
Components of net periodic benefit costs included in operating expenses [Abstract]
Employer contribution for postretirement health care and life insurance				$ 480