Financial Instruments and Risk Management - Fair Value of the Partnership's Senior Notes (Details) - USD ($) $ in Thousands	Dec. 26, 2015	Sep. 26, 2015
Bank Debt and Senior Notes [Abstract]
Fair value of Senior Notes	$ 989,554	$ 1,103,922
7.375% Senior Notes due August 1, 2021 [Member]
Bank Debt and Senior Notes [Abstract]
Fair value of Senior Notes	334,929	363,922
5.5% Senior Notes due June 1, 2024 [Member]
Bank Debt and Senior Notes [Abstract]
Fair value of Senior Notes	433,125	498,750
5.75% Senior Notes due March 1, 2025 [Member]
Bank Debt and Senior Notes [Abstract]
Fair value of Senior Notes	$ 221,500	$ 241,250