CONDENSED CONSOLIDATED STATEMENT OF PARTNERS' CAPITAL - 6 months ended Mar. 31, 2018 - USD ($) shares in Thousands, $ in Thousands		Total		General Partner	Common Stock	Accumulated Other Comprehensive Income (Loss)
Beginning Balance at Sep. 30, 2017		$ 306,068		$ (929)	$ 325,762	$ (18,765)
Beginning Balance, unit at Sep. 30, 2017				326	55,888
Net income		84,960		$ 494	$ 84,466
Unrealized gain on pension plan obligation		896	[1]			896
Tax effect of unrealized gain on pension plan		(302)				(302)
Unrealized loss on captive insurance collateral		(931)				(931)
Tax effect of unrealized loss on captive insurance collateral		196				196
Distributions		(12,604)		(308)	(12,296)
Retirement of units	[2]	(12,023)			$ (12,023)
Retirement of units, shares	[2]				(1,281)
Ending Balance at Mar. 31, 2018		$ 366,260		$ (743)	$ 385,909	$ (18,906)
Ending Balance, Unit at Mar. 31, 2018				326	54,607

[1] This item is included in the computation of net periodic pension cost.

[2] See Note 3 – Common Unit Repurchase and Retirement.