Leases - Schedule of Quantitative Information on the Partnership's Lease Population (Details) $ in Thousands	3 Months Ended	6 Months Ended
	Mar. 28, 2020 USD ($)	Mar. 28, 2020 USD ($)
Lessee Disclosure [Abstract]
Lease expense	$ 7,673	$ 14,935
Other information:
Cash payments for operating leases	7,843	15,253
Right-of-use assets obtained in exchange for new operating lease liabilities	$ 16,114	$ 21,445
Weighted-average remaining lease term	6 years 7 months 6 days	6 years 7 months 6 days
Weighted-average discount rate	5.10%	5.10%