Pension and Other Postretirement Benefit Plans - Narrative (Details) $ in Thousands	6 Months Ended
Mar. 31, 2017 USD ($)
Pension
Defined Benefit Plan Disclosure [Line Items]
Additional contributions expected in fiscal 2017:	$ 5,109

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

No definition available.

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