Pension Plans (Fair Value Of Plan Assets) (Details) - USD ($) $ in Thousands		Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2014
Fair Value of Plan Assets [Line Items]
Fair value of plan assets		$ 61,935	$ 57,961	$ 157,350
International Plan Assets [Member]
Fair Value of Plan Assets [Line Items]
Fair value of plan assets		61,935	57,961
Government [Member] | International Plan Assets [Member]
Fair Value of Plan Assets [Line Items]
Fair value of plan assets		8,518	11,086
Europe Corporate Investment Grade [Member] | International Plan Assets [Member]
Fair Value of Plan Assets [Line Items]
Fair value of plan assets		10,218	7,487
Europe Large Capitalization Stocks [Member] | International Plan Assets [Member]
Fair Value of Plan Assets [Line Items]
Fair value of plan assets		30,615	30,887
Commodity Option [Member] | International Plan Assets [Member]
Fair Value of Plan Assets [Line Items]
Fair value of plan assets		2,709
Insurance Company Funds [Member] | International Plan Assets [Member]
Fair Value of Plan Assets [Line Items]
Fair value of plan assets	[1]	9,578	7,668
Cash [Member] | International Plan Assets [Member]
Fair Value of Plan Assets [Line Items]
Fair value of plan assets		297	833
Level 1 [Member] | International Plan Assets [Member]
Fair Value of Plan Assets [Line Items]
Fair value of plan assets		52,357	50,293
Level 1 [Member] | Government [Member] | International Plan Assets [Member]
Fair Value of Plan Assets [Line Items]
Fair value of plan assets		8,518	11,086
Level 1 [Member] | Europe Corporate Investment Grade [Member] | International Plan Assets [Member]
Fair Value of Plan Assets [Line Items]
Fair value of plan assets		10,218	7,487
Level 1 [Member] | Europe Large Capitalization Stocks [Member] | International Plan Assets [Member]
Fair Value of Plan Assets [Line Items]
Fair value of plan assets		30,615	30,887
Level 1 [Member] | Commodity Option [Member] | International Plan Assets [Member]
Fair Value of Plan Assets [Line Items]
Fair value of plan assets		2,709
Level 1 [Member] | Insurance Company Funds [Member] | International Plan Assets [Member]
Fair Value of Plan Assets [Line Items]
Fair value of plan assets	[1]	0	0
Level 1 [Member] | Cash [Member] | International Plan Assets [Member]
Fair Value of Plan Assets [Line Items]
Fair value of plan assets		297	833
Level 2 [Member] | International Plan Assets [Member]
Fair Value of Plan Assets [Line Items]
Fair value of plan assets		9,578	7,668
Level 2 [Member] | Government [Member] | International Plan Assets [Member]
Fair Value of Plan Assets [Line Items]
Fair value of plan assets		0	0
Level 2 [Member] | Europe Corporate Investment Grade [Member] | International Plan Assets [Member]
Fair Value of Plan Assets [Line Items]
Fair value of plan assets		0	0
Level 2 [Member] | Europe Large Capitalization Stocks [Member] | International Plan Assets [Member]
Fair Value of Plan Assets [Line Items]
Fair value of plan assets		0	0
Level 2 [Member] | Commodity Option [Member] | International Plan Assets [Member]
Fair Value of Plan Assets [Line Items]
Fair value of plan assets		0
Level 2 [Member] | Insurance Company Funds [Member] | International Plan Assets [Member]
Fair Value of Plan Assets [Line Items]
Fair value of plan assets	[1]	9,578	7,668
Level 2 [Member] | Cash [Member] | International Plan Assets [Member]
Fair Value of Plan Assets [Line Items]
Fair value of plan assets		0	0
Level 3 [Member] | International Plan Assets [Member]
Fair Value of Plan Assets [Line Items]
Fair value of plan assets		0	0
Level 3 [Member] | Government [Member] | International Plan Assets [Member]
Fair Value of Plan Assets [Line Items]
Fair value of plan assets		0	0
Level 3 [Member] | Europe Corporate Investment Grade [Member] | International Plan Assets [Member]
Fair Value of Plan Assets [Line Items]
Fair value of plan assets		0	0
Level 3 [Member] | Europe Large Capitalization Stocks [Member] | International Plan Assets [Member]
Fair Value of Plan Assets [Line Items]
Fair value of plan assets		0	0
Level 3 [Member] | Commodity Option [Member] | International Plan Assets [Member]
Fair Value of Plan Assets [Line Items]
Fair value of plan assets		0
Level 3 [Member] | Insurance Company Funds [Member] | International Plan Assets [Member]
Fair Value of Plan Assets [Line Items]
Fair value of plan assets	[1]	0	0
Level 3 [Member] | Cash [Member] | International Plan Assets [Member]
Fair Value of Plan Assets [Line Items]
Fair value of plan assets		$ 0	$ 0

[1] These investments are comprised primarily of funds invested with an insurance company in Japan with a guaranteed rate of return. The insurance company invests these assets primarily in government and corporate bonds.