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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.

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