Employee Benefit Plans - Schedule of Obligations and Funded Status (Details) - USD ($) $ in Thousands	12 Months Ended
	Aug. 29, 2026	Aug. 30, 2025	Aug. 31, 2024
Change in plan assets:
Fair value of plan assets, beginning of year	$ 2,474
Fair value of plan assets, end of year	1,866	$ 2,474
UniFirst Plan
Change in benefit obligation:
Projected benefit obligation, beginning of year	3,004	3,609
Service cost	74	73	$ 74
Interest cost	133	148	159
Actuarial loss (gain)	152	3
Benefits paid	(19)	(37)
Settlements	(768)	(792)
Projected benefit obligation, end of year	2,576	3,004	3,609
Change in plan assets:
Fair value of plan assets, beginning of year	2,474	3,108
Actual return on plan assets	(18)	27
Employer Contributions	197	168
Benefits paid	(19)	(37)
Settlements	(768)	(792)
Fair value of plan assets, end of year	1,866	2,474	3,108
Funded status (net amount recognized)	(710)	(530)
SERP
Change in benefit obligation:
Projected benefit obligation, beginning of year	23,479	25,880
Service cost	274	390	405
Interest cost	1,224	1,239	1,255
Actuarial loss (gain)	(1,508)	(2,549)
Benefits paid	(1,614)	(1,481)
Settlements	0	0
Projected benefit obligation, end of year	21,855	23,479	25,880
Change in plan assets:
Fair value of plan assets, beginning of year	0	0
Actual return on plan assets	0	0
Employer Contributions	0	0
Benefits paid	0	0
Settlements	0	0
Fair value of plan assets, end of year	0	0	$ 0
Funded status (net amount recognized)	$ (21,855)	$ (23,479)