Distributions of Available Cash - Quarterly Distributions Per Common Unit Declared and Paid (Details) - $ / shares	3 Months Ended
	Sep. 30, 2017	Jun. 24, 2017	Mar. 25, 2017	Dec. 24, 2016	Sep. 24, 2016	Jun. 25, 2016	Mar. 26, 2016	Dec. 26, 2015	Sep. 26, 2015	Jun. 27, 2015	Mar. 28, 2015	Dec. 27, 2014
Distributions Made To Members Or Limited Partners [Abstract]
Distributions paid (in dollars per unit)	$ 0.6000	$ 0.8875	$ 0.8875	$ 0.8875	$ 0.8875	$ 0.8875	$ 0.8875	$ 0.8875	$ 0.8875	$ 0.8875	$ 0.8875	$ 0.8750
Distributions declared (in dollars per unit)	$ 0.6000	$ 0.8875	$ 0.8875	$ 0.8875	$ 0.8875	$ 0.8875	$ 0.8875	$ 0.8875	$ 0.8875	$ 0.8875	$ 0.8875	$ 0.8750