Leases - Schedule of Quantitative Information on the Partnership's Lease Population (Details) $ in Thousands	3 Months Ended	9 Months Ended
	Jun. 27, 2020 USD ($)	Jun. 27, 2020 USD ($)
Lessee Disclosure [Abstract]
Lease expense	$ 8,314	$ 23,249
Other information:
Cash payments for operating leases	8,375	23,628
Right-of-use assets obtained in exchange for new operating lease liabilities	$ 6,616	$ 28,061
Weighted-average remaining lease term	6 years 6 months	6 years 6 months
Weighted-average discount rate	5.30%	5.30%