Pension Plans (Fair Value Of Plan Assets) (Details) (USD $) In Thousands	Sep. 30, 2011		Sep. 30, 2010	Sep. 30, 2009
Fair Value of Plan Assets [Line Items]
Fair value of plan assets	$ 110,781		$ 115,120	$ 105,071
International Plan Assets [Member] | Level 1 [Member]
Fair Value of Plan Assets [Line Items]
Fair value of plan assets	27,191
International Plan Assets [Member] | Level 1 [Member] | Cash [Member]
Fair Value of Plan Assets [Line Items]
Fair value of plan assets	846
International Plan Assets [Member] | Level 1 [Member] | Government [Member]
Fair Value of Plan Assets [Line Items]
Fair value of plan assets	7,062
International Plan Assets [Member] | Level 1 [Member] | Europe Corporate Investment Grade [Member]
Fair Value of Plan Assets [Line Items]
Fair value of plan assets	4,299
International Plan Assets [Member] | Level 1 [Member] | Europe Large Capitalization Stocks [Member]
Fair Value of Plan Assets [Line Items]
Fair value of plan assets	14,984
U.S. Plan Assets Common Collective Trusts [Member] | Level 2 [Member]
Fair Value of Plan Assets [Line Items]
Fair value of plan assets	74,367
U.S. Plan Assets Common Collective Trusts [Member] | Level 2 [Member] | U.S. Treasury, Agency And Other Local Government And Non-Corporate [Member]
Fair Value of Plan Assets [Line Items]
Fair value of plan assets	9,991
U.S. Plan Assets Common Collective Trusts [Member] | Level 2 [Member] | Mortgage-Backed [Member]
Fair Value of Plan Assets [Line Items]
Fair value of plan assets	8,678
U.S. Plan Assets Common Collective Trusts [Member] | Level 2 [Member] | Corporate Investment Grade [Member]
Fair Value of Plan Assets [Line Items]
Fair value of plan assets	10,948
U.S. Plan Assets Common Collective Trusts [Member] | Level 2 [Member] | Large Capitalization Stocks [Member]
Fair Value of Plan Assets [Line Items]
Fair value of plan assets	33,368
U.S. Plan Assets Common Collective Trusts [Member] | Level 2 [Member] | Small Capitalization Stocks [Member]
Fair Value of Plan Assets [Line Items]
Fair value of plan assets	4,936
U.S. Plan Assets Common Collective Trusts [Member] | Level 2 [Member] | U.S. Real Estate Investment Trusts [Member]
Fair Value of Plan Assets [Line Items]
Fair value of plan assets	712
U.S. Plan Assets Common Collective Trusts [Member] | Level 2 [Member] | Large/ Mid Capitalization Stocks [Member]
Fair Value of Plan Assets [Line Items]
Fair value of plan assets	4,913
U.S. Plan Assets Common Collective Trusts [Member] | Level 2 [Member] | Small Capitalization Stocks In International Equity Securities [Member]
Fair Value of Plan Assets [Line Items]
Fair value of plan assets	72
U.S. Plan Assets Common Collective Trusts [Member] | Level 2 [Member] | Emerging Large Mid Capitalization Stocks [Member]
Fair Value of Plan Assets [Line Items]
Fair value of plan assets	686
U.S. Plan Assets Common Collective Trusts [Member] | Level 2 [Member] | Commodities [Member]
Fair Value of Plan Assets [Line Items]
Fair value of plan assets	63
International Plan Assets [Member] | Level 2 [Member]
Fair Value of Plan Assets [Line Items]
Fair value of plan assets	9,223
International Plan Assets [Member] | Level 2 [Member] | Insurance Company Funds [Member]
Fair Value of Plan Assets [Line Items]
Fair value of plan assets	9,223	[1]
U.S. Plan Assets Common Collective Trusts [Member] | U.S. Treasury, Agency And Other Local Government And Non-Corporate [Member]
Fair Value of Plan Assets [Line Items]
Fair value of plan assets	9,991
U.S. Plan Assets Common Collective Trusts [Member] | Mortgage-Backed [Member]
Fair Value of Plan Assets [Line Items]
Fair value of plan assets	8,678
U.S. Plan Assets Common Collective Trusts [Member] | Corporate Investment Grade [Member]
Fair Value of Plan Assets [Line Items]
Fair value of plan assets	10,948
U.S. Plan Assets Common Collective Trusts [Member] | Large Capitalization Stocks [Member]
Fair Value of Plan Assets [Line Items]
Fair value of plan assets	33,368
U.S. Plan Assets Common Collective Trusts [Member] | Small Capitalization Stocks [Member]
Fair Value of Plan Assets [Line Items]
Fair value of plan assets	4,936
U.S. Plan Assets Common Collective Trusts [Member] | U.S. Real Estate Investment Trusts [Member]
Fair Value of Plan Assets [Line Items]
Fair value of plan assets	712
U.S. Plan Assets Common Collective Trusts [Member] | Large/ Mid Capitalization Stocks [Member]
Fair Value of Plan Assets [Line Items]
Fair value of plan assets	4,913
U.S. Plan Assets Common Collective Trusts [Member] | Small Capitalization Stocks In International Equity Securities [Member]
Fair Value of Plan Assets [Line Items]
Fair value of plan assets	72
U.S. Plan Assets Common Collective Trusts [Member] | Emerging Large Mid Capitalization Stocks [Member]
Fair Value of Plan Assets [Line Items]
Fair value of plan assets	686
U.S. Plan Assets Common Collective Trusts [Member] | Commodities [Member]
Fair Value of Plan Assets [Line Items]
Fair value of plan assets	63
International Plan Assets [Member] | Cash [Member]
Fair Value of Plan Assets [Line Items]
Fair value of plan assets	846
International Plan Assets [Member] | Government [Member]
Fair Value of Plan Assets [Line Items]
Fair value of plan assets	7,062
International Plan Assets [Member] | Europe Corporate Investment Grade [Member]
Fair Value of Plan Assets [Line Items]
Fair value of plan assets	4,299
International Plan Assets [Member] | Europe Large Capitalization Stocks [Member]
Fair Value of Plan Assets [Line Items]
Fair value of plan assets	14,984
International Plan Assets [Member] | Insurance Company Funds [Member]
Fair Value of Plan Assets [Line Items]
Fair value of plan assets	9,223	[1]
U.S. Plan Assets Common Collective Trusts [Member]
Fair Value of Plan Assets [Line Items]
Fair value of plan assets	74,367
International Plan Assets [Member]
Fair Value of Plan Assets [Line Items]
Fair value of plan assets	$ 36,414

[1] These investments are comprised primarily of fixed income security funds invested with an insurance company in Japan.