Income Taxes (Composition of Deferred Income Taxes) (Details) - USD ($) $ in Thousands	Sep. 30, 2015	Sep. 30, 2014
Deferred tax assets:
Defined benefit plans, other postretirement	$ 12,878	$ 10,762
Foreign net operating loss carryforwards	6,537	5,552
Inventory	21,651	21,608
Deferred and stock-based compensation	31,310	24,987
Defined benefit pension	4,217	227
Other reserves	9,289	10,513
Credits and incentives	9,162	8,178
Other	5,963	11,422
Valuation allowance	(6,804)	(9,486)
Total deferred tax assets, net of valuation allowance	94,203	83,763
Deferred tax liabilities:
Goodwill and intangibles - net	(98,906)	(96,493)
Property, plant and equipment	(34,625)	(18,288)
Other	(3,981)	(7,419)
Total deferred tax liabilities	(137,512)	(122,200)
Net deferred tax liabilities	$ (43,309)	$ (38,437)