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CONSOLIDATED STATEMENTS OF PARTNERS' CAPITAL - USD ($)
shares in Thousands, $ in Thousands
Total
General Partner
Common Stock
Accumulated Other Comprehensive Income (Loss)
Beginning Balance at Sep. 30, 2016 $ 301,493 $ (516) $ 322,771 $ (20,762)
Beginning Balance, unit at Sep. 30, 2016   326 55,888  
Net income 26,900 $ 156 $ 26,744  
Unrealized gain (loss) on pension plan obligation [1] 3,356     3,356
Tax effect of unrealized gain (loss) on pension plan obligation (1,359)     (1,359)
Distributions [2] (24,322) (569) (23,753)  
Ending Balance at Sep. 30, 2017 306,068 $ (929) $ 325,762 (18,765)
Ending Balance, Unit at Sep. 30, 2017   326 55,888  
Reclassification of stranded tax effects resulting from tax reform     $ (195) 195
Net income 55,505 $ 314 55,191  
Unrealized gain (loss) on pension plan obligation [1] 2,075     2,075
Tax effect of unrealized gain (loss) on pension plan obligation (625)     (625)
Unrealized gain (loss) on captive insurance collateral (1,204)     (1,204)
Tax effect of unrealized gain (loss) on captive insurance collateral 254     254
Unrealized gain (loss) on interest rate hedge 39     39
Tax effect of unrealized gain (loss) on interest rate hedge (10)     (10)
Distributions [2] (25,603) (688) (24,915)  
Retirement of units [3] (26,714)   $ (26,714)  
Retirement of units, shares [3]     (2,800)  
Ending Balance at Sep. 30, 2018 309,785 $ (1,303) $ 329,129 (18,041)
Ending Balance, Unit at Sep. 30, 2018   326 53,088  
Impact of adoption of ASU No. 2014-09 9,224 $ 60 $ 9,164  
Net income 17,637 95 17,542  
Unrealized gain (loss) on pension plan obligation [1] 1,170     1,170
Tax effect of unrealized gain (loss) on pension plan obligation (320)     (320)
Unrealized gain (loss) on captive insurance collateral 2,231     2,231
Tax effect of unrealized gain (loss) on captive insurance collateral (473)     (473)
Unrealized gain (loss) on interest rate hedge (1,993)     (1,993)
Tax effect of unrealized gain (loss) on interest rate hedge 525     525
Distributions [2] (25,593) (820) (24,773)  
Retirement of units [3] (51,353)   $ (51,353)  
Retirement of units, shares [3]     (5,403)  
Ending Balance at Sep. 30, 2019 $ 260,840 $ (1,968) $ 279,709 $ (16,901)
Ending Balance, Unit at Sep. 30, 2019   326 47,685  
[1] These items are included in the computation of net periodic pension cost. See Note 14 - Employee Benefit Plans.
[2] See Note 4 - Quarterly Distributions of Available Cash.
[3] See Note 5 - Common Unit Repurchase Plans and Retirement.