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CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (Unaudited) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Jun. 30, 2021 | Jun. 30, 2020 | Jun. 30, 2021 | Jun. 30, 2020
Statement of Comprehensive Income [Abstract] |  |  |  |
Net (loss) income | $ (111,831) | $ (19,298) | $ 119,023 | $ 130,300
Other comprehensive income (loss), net of tax |  |  |  |
Reclassifications of losses to net income on derivatives designated as hedging instruments, net of tax of $(79), $0, $(270) and $0, respectively | 264 | 0 | 758 | 0
Loss on derivatives designated as hedging instruments, net of tax of $0, $180, $0 and $2,961, respectively | 0 | (626) | 0 | (10,337)
Adjustment to postemployment benefit obligation, net of tax of $(245), $(191), $(734) and $(2,161), respectively | 812 | 663 | 2,437 | 7,522
Other comprehensive income (loss) | 1,076 | 37 | 3,195 | (2,815)
Comprehensive (loss) income | $ (110,755) | $ (19,261) | $ 122,218 | $ 127,485

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