Employee Benefit Plans - Schedule of Measurement of Partnership's Pension Plan Assets by Category (Details) - Pension Benefits [Member] - USD ($) $ in Thousands		Sep. 24, 2016	Sep. 26, 2015	Sep. 27, 2014
Fair value of plan assets [Abstract]
Fair value of plan assets		$ 101,077	$ 104,303	$ 117,771
Fair Value, Inputs, Level 2 [Member]
Fair value of plan assets [Abstract]
Fair value of plan assets		101,077	104,303
Fair Value, Inputs, Level 2 [Member] | Short-term investments [Member]
Fair value of plan assets [Abstract]
Fair value of plan assets	[1]	1,456	99
Fair Value, Inputs, Level 2 [Member] | Domestic equity securities [Member]
Fair value of plan assets [Abstract]
Fair value of plan assets	[1],[2]	5,397	5,264
Fair Value, Inputs, Level 2 [Member] | International equity securities [Member]
Fair value of plan assets [Abstract]
Fair value of plan assets	[1],[2]	9,501	8,923
Fair Value, Inputs, Level 2 [Member] | Fixed income securities [Member]
Fair value of plan assets [Abstract]
Fair value of plan assets	[1],[3]	$ 84,723	$ 90,017

[1] Includes funds which are not publicly traded and are valued at the net asset value of the units provided by the fund issuer.

[2] Includes funds which invest primarily in a diversified portfolio of publicly traded U.S. and Non-U.S. common stock.

[3] Includes funds which invest primarily in publicly traded and non-publicly traded, investment grade corporate bonds, U.S. government bonds and asset-backed securities.