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Consolidated Statements Of Partners' Capital And Comprehensive Income (Loss) (USD $) In Thousands | Common [Member] | General Partner [Member] | Accum. Other Comprehensive Income (Loss) [Member] | Total
--- | --- | --- | --- | ---
Balance, Value at Sep. 30, 2008 |  | $ 219,544 | $ (186) | $ (19,381) | $ 199,977
Balance, Units at Sep. 30, 2008 |  | 75,774 | 326 |  |
Net income |  | 130,477 | 561 |  | 131,038
Unrealized gain (loss) on pension plan obligation |  |  |  | (11,854) | (11,854)
Tax effect of unrealized (gain) loss on pension plan obligation |  |  |  | 4,920 | 4,920
Total comprehensive income |  | 130,477 | 561 | (6,934) | 124,104
Distributions | [1] | (15,345) | (66) |  | (15,411)
Retirement of units, Value | [2] | (2,336) |  |  | (2,336)
Retirement of units, Units | [2] | (637) |  |  |
Balance, Value at Sep. 30, 2009 |  | 332,340 | 309 | (26,315) | 306,334
Balance, Units at Sep. 30, 2009 |  | 75,137 | 326 |  |
Net income |  | 28,192 | 128 |  | 28,320
Unrealized gain (loss) on pension plan obligation |  |  |  | (1,977) | (1,977)
Tax effect of unrealized (gain) loss on pension plan obligation |  |  |  | 821 | 821
Total comprehensive income |  | 28,192 | 128 | (1,156) | 27,164
Distributions | [1] | (20,206) | (147) |  | (20,353)
Retirement of units, Value | [2] | (33,234) |  |  | (33,234)
Retirement of units, Units | [2] | (8,059) |  |  |
Balance, Value at Sep. 30, 2010 |  | 307,092 | 290 | (27,471) | 279,911
Balance, Units at Sep. 30, 2010 |  | 67,078 | 326 |  |
Net income |  | 24,229 | 115 |  | 24,344
Unrealized gain (loss) on pension plan obligation |  |  |  | 171 | 171
Tax effect of unrealized (gain) loss on pension plan obligation |  |  |  | (167) | (167)
Total comprehensive income |  | 24,229 | 115 | 4 | 24,348
Distributions | [1] | (20,459) | (218) |  | (20,677)
Retirement of units, Value | [2] | (10,949) |  |  | (10,949)
Retirement of units, Units | [2] | (2,108) |  |  |
Balance, Value at Sep. 30, 2011 |  | $ 299,913 | $ 187 | $ (27,467) | $ 272,633
Balance, Units at Sep. 30, 2011 |  | 64,970 | 326 |  |
[1] | See Note 4—Quarterly Distributions of Available Cash.
[2] | See Note 2—Common Unit Repurchase and Retirement.

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- Definition 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. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 810 -SubTopic 10 -Section 55 -Paragraph 4K -URI http://asc.fasb.org/extlink&oid=6922042&loc=SL4591552-111686 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 810 -SubTopic 10 -Section 45 -Paragraph 19 -URI http://asc.fasb.org/extlink&oid=6921628&loc=SL4569616-111683 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Accounting Research Bulletin (ARB) -Number 51 -Paragraph A5 -Appendix A Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Accounting Research Bulletin (ARB) -Number 51 -Paragraph 29 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Accounting Research Bulletin (ARB) -Number 51 -Paragraph 38 -Subparagraph a -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. + Details
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