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CONDENSED CONSOLIDATED STATEMENT OF PARTNERS' CAPITAL - 9 months ended Jun. 30, 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 |  | 76,955 |  | $ 445 | $ 76,510 |
Unrealized gain on pension plan obligation |  | 1,344 | [1] |  |  | 1,344
Tax effect of unrealized gain on pension plan |  | (422) |  |  |  | (422)
Unrealized loss on captive insurance collateral |  | (1,151) |  |  |  | (1,151)
Tax effect of unrealized loss on captive insurance collateral |  | 242 |  |  |  | 242
Distributions |  | (19,139) |  | (499) | (18,640) |
Retirement of units | [2] | (22,538) |  |  | $ (22,538) |
Retirement of units, shares | [2] |  |  |  | (2,370) |
Ending Balance at Jun. 30, 2018 |  | $ 341,359 |  | $ (983) | $ 361,094 | $ (18,752)
Ending Balance, Unit at Jun. 30, 2018 |  |  |  | 326 | 53,518 |
[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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