CONDENSED CONSOLIDATED STATEMENT OF PARTNERS' CAPITAL (unaudited) - 3 months ended Dec. 30, 2017 - USD ($) shares in Thousands, $ in Thousands	Total	Common Unitholders [Member]	Accumulated Other Comprehensive (Loss) [Member]
Balance at Sep. 30, 2017	$ 552,982	$ 581,794	$ (28,812)
Balance (in units) at Sep. 30, 2017		61,105
Net income	37,168	$ 37,168
Other comprehensive income	757		757
Partnership distributions	(36,663)	$ (36,663)
Common Units issued under Restricted Unit Plans (in units)		284
Compensation cost recognized under Restricted Unit Plans, net of forfeitures	1,803	$ 1,803
Balance at Dec. 30, 2017	$ 556,047	$ 584,102	$ (28,055)
Balance (in units) at Dec. 30, 2017		61,389