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Other (Income) Expense, Net (Schedule of Other (Income) Expense, Net) (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Mar. 31, 2019 | Mar. 31, 2018 | Mar. 31, 2019 | Mar. 31, 2018
Other (Income) Expense, Net [Abstract] |  |  |  |
Equity interest in the earnings of the JV (Note 6) | $ (3,006) | $ (1,006) | $ (4,471) | $ (1,602)
Net (gain) loss on sales of assets | 121 | (396) | 200 | (454)
Rent income | (77) | (17) | (144) | (71)
Net (gain) loss on investments in deferred compensation program | (1,656) | (46) | 73 | (700)
Other components of net periodic pension and other postretirement benefit, excluding service cost and interest expense | (3,251) | (3,233) | (6,494) | (6,381)
Other | (170) | (148) | (382) | (358)
Other expense (income), net | $ (8,039) | $ (4,846) | $ (11,218) | $ (9,566)

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