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Condensed Consolidated Statement Of Partners' Capital And Comprehensive Income (USD $) In Thousands, unless otherwise specified		Common [Member]	General Partner [Member]	Accum. Other Comprehensive Income (Loss) [Member]	Total
Balance, Value at Sep. 30, 2011		$ 299,913	$ 187	$ (27,467)	$ 272,633
Balance, Units at Sep. 30, 2011		64,970	326
Comprehensive income (unaudited):
Net income		43,185	228		43,413
Unrealized gain on pension plan obligation				1,376	1,376
Tax effect of unrealized gain on pension plan				(561)	(561)
Total comprehensive income		43,185	228	815	44,228
Distributions		(9,840)	(114)		(9,954)
Retirement of units (1), Value	[1]	(19,555)			(19,555)
Retirement of units (1), Units	[1]	(3,946)
Balance, Value at Mar. 31, 2012		$ 313,703	$ 301	$ (26,652)	$ 287,352
Balance, Units at Mar. 31, 2012		61,024	326
[1] See Note 2 - Common Unit Repurchase and Retirement.

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The change in equity [net assets] of a business enterprise during a period from transactions and other events and circumstances from non-owner sources which are attributable to the economic entity, including both controlling (parent) and noncontrolling interests. It includes all changes in equity during a period except those resulting from investments by owners and distributions to owners, including any and all transactions which are directly or indirectly attributable to that ownership interest in subsidiary equity which is not attributable to the parent.

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