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Other (Income) Expense, Net (Details) - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2016
Other (Income) Expense, Net
Equity interest in losses (earnings) of the JV (Note 4)	$ (3,339)	$ (2,568)	$ (6,204)
Net (gain) loss on sales of assets	(1,106)	(3,604)	(4,431)
Rent income	(170)	(254)	(315)
Net (gain) loss on investments in deferred compensation program	(1,661)	(1,833)	(1,062)
Loss on forward options derivative instrument (Note 7)	5,543	0	0
Other	(792)	(786)	(294)
Other (income) expense, net	$ (1,525)	$ (9,045)	$ (12,306)

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The premium (cost) of a hedge, expensed during the period.

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Amount of gain (loss) on sale or disposal of assets, including but not limited to property plant and equipment, intangible assets and equity in securities of subsidiaries or equity method investee.

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