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v3.19.1

CONDENSED CONSOLIDATED STATEMENT OF PARTNERS' CAPITAL - 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 |  | 30,182 |  | $ 175 | $ 30,007 |
Unrealized gain on pension plan obligation |  | 448 |  |  |  | 448
Tax effect of unrealized gain on pension plan |  | (135) |  |  |  | (135)
Distributions |  | (6,302) |  | (154) | (6,148) |
Ending Balance at Dec. 31, 2017 |  | 330,261 |  | $ (908) | $ 349,621 | (18,452)
Ending Balance, Unit at Dec. 31, 2017 |  |  |  | 326 | 55,888 |
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 |  |  |  |
Unrealized gain on pension plan obligation | [1] | 896 |  |  |  |
Tax effect of unrealized gain on pension plan |  | (302) |  |  |  |
Unrealized gain (loss) on captive insurance collateral |  | (931) |  |  |  |
Tax effect of unrealized gain (loss) on captive insurance collateral |  | 196 |  |  |  |
Ending Balance at Mar. 31, 2018 |  | 366,260 |  | $ (743) | $ 385,909 | (18,906)
Ending Balance, Unit at Mar. 31, 2018 |  |  |  | 326 | 54,607 |
Beginning Balance at Dec. 31, 2017 |  | 330,261 |  | $ (908) | $ 349,621 | (18,452)
Beginning Balance, unit at Dec. 31, 2017 |  |  |  | 326 | 55,888 |
Net income |  | 54,778 |  | $ 319 | $ 54,459 |
Unrealized gain on pension plan obligation |  | 448 | [1] |  |  | 448
Tax effect of unrealized gain on pension plan |  | (167) |  |  |  | (167)
Unrealized gain (loss) on captive insurance collateral |  | (931) |  |  |  | (931)
Tax effect of unrealized gain (loss) on captive insurance collateral |  | 196 |  |  |  | 196
Distributions |  | (6,302) |  | (154) | (6,148) |
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 |
Beginning Balance at Sep. 30, 2018 |  | 309,785 |  | $ (1,303) | $ 329,129 | (18,041)
Beginning Balance, unit at Sep. 30, 2018 |  |  |  | 326 | 53,088 |
Impact from adoption of ASU No. 2014-09 |  | 9,224 |  | $ 60 | $ 9,164 |
Net income |  | 2,315 |  | 15 | 2,300 |
Unrealized gain on pension plan obligation |  | 454 |  |  |  | 454
Tax effect of unrealized gain on pension plan |  | (124) |  |  |  | (124)
Unrealized gain (loss) on captive insurance collateral |  | 389 |  |  |  | 389
Tax effect of unrealized gain (loss) on captive insurance collateral |  | (82) |  |  |  | (82)
Unrealized loss on interest rate hedges |  | (745) |  |  |  | (745)
Tax effect of unrealized loss on interest rate hedges |  | 197 |  |  |  | 197
Distributions |  | (6,413) |  | (188) | (6,225) |
Retirement of units | [2] | (5,735) |  |  | $ (5,735) |
Retirement of units, shares | [2] |  |  |  | (599) |
Ending Balance at Dec. 31, 2018 |  | 309,265 |  | $ (1,416) | $ 328,633 | (17,952)
Ending Balance, Unit at Dec. 31, 2018 |  |  |  | 326 | 52,489 |
Beginning Balance at Sep. 30, 2018 |  | 309,785 |  | $ (1,303) | $ 329,129 | (18,041)
Beginning Balance, unit at Sep. 30, 2018 |  |  |  | 326 | 53,088 |
Net income |  | 74,640 |  |  |  |
Unrealized gain on pension plan obligation | [1] | 911 |  |  |  |
Tax effect of unrealized gain on pension plan |  | (249) |  |  |  |
Unrealized gain (loss) on captive insurance collateral |  | 1,294 |  |  |  |
Tax effect of unrealized gain (loss) on captive insurance collateral |  | (276) |  |  |  |
Unrealized loss on interest rate hedges |  | (1,112) |  |  |  |
Tax effect of unrealized loss on interest rate hedges |  | 292 |  |  |  |
Ending Balance at Mar. 31, 2019 |  | 355,421 |  | $ (1,146) | $ 373,748 | (17,181)
Ending Balance, Unit at Mar. 31, 2019 |  |  |  | 326 | 50,302 |
Beginning Balance at Dec. 31, 2018 |  | 309,265 |  | $ (1,416) | $ 328,633 | (17,952)
Beginning Balance, unit at Dec. 31, 2018 |  |  |  | 326 | 52,489 |
Net income |  | 72,325 |  | $ 454 | $ 71,871 |
Unrealized gain on pension plan obligation |  | 457 | [1] |  |  | 457
Tax effect of unrealized gain on pension plan |  | (125) |  |  |  | (125)
Unrealized gain (loss) on captive insurance collateral |  | 905 |  |  |  | 905
Tax effect of unrealized gain (loss) on captive insurance collateral |  | (194) |  |  |  | (194)
Unrealized loss on interest rate hedges |  | (367) |  |  |  | (367)
Tax effect of unrealized loss on interest rate hedges |  | 95 |  |  |  | 95
Distributions |  | (6,304) |  | (184) | (6,120) |
Retirement of units | [2] | (20,636) |  |  | $ (20,636) |
Retirement of units, shares | [2] |  |  |  | (2,187) |
Ending Balance at Mar. 31, 2019 |  | $ 355,421 |  | $ (1,146) | $ 373,748 | $ (17,181)
Ending Balance, Unit at Mar. 31, 2019 |  |  |  | 326 | 50,302 |
[1] | This item is included in the computation of net periodic pension cost.
[2] | See Note 4 – Common Unit Repurchase and Retirement.

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