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Financial Instruments and Fair Value Measurements (Estimated Fair Values of Financial Instruments) (Details) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2012	Sep. 30, 2011	Mar. 31, 2011	Sep. 30, 2010
Financial Instruments and Fair Value Measurements
Cash and cash equivalents, Estimated Fair Value	$ 56,329	$ 74,539
Investments in deferred compensation program, Estimated Fair Value	7,221	5,855
Short-term borrowings, Estimated Fair Value	(32,500)	0
Long-term debt, including current portion, Estimated Fair Value	(464,137)	(482,776)
Cash and cash equivalents, Carrying Cost	56,329	74,539	60,819	105,579
Investments in deferred compensation program, Carrying Cost	7,221	5,855
Short-term borrowings, Carrying Cost	(32,500)	0
Long-term debt, including current portion, Carrying Cost	$ (410,728)	$ (425,246)

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Includes currency on hand as well as demand deposits with banks or financial institutions. It also includes other kinds of accounts that have the general characteristics of demand deposits in that the Entity may deposit additional funds at any time and also effectively may withdraw funds at any time without prior notice or penalty. Cash equivalents, excluding items classified as marketable securities, include short-term, highly liquid investments that are both readily convertible to known amounts of cash, and so near their maturity that they present minimal risk of changes in value because of changes in interest rates. Generally, only investments with original maturities of three months or less qualify under that definition. Original maturity means original maturity to the entity holding the investment. For example, both a three-month US Treasury bill and a three-year Treasury note purchased three months from maturity qualify as cash equivalents. However, a Treasury note purchased three years ago does not become a cash equivalent when its remaining maturity is three months. Compensating balance arrangements that do not legally restrict the withdrawal or usage of cash amounts may be reported as Cash and Cash Equivalents, while legally restricted deposits held as compensating balances against borrowing arrangements, contracts entered into with others, or company statements of intention with regard to particular deposits are not generally reported as cash and cash equivalents. Includes cash and cash equivalents associated with the entity's continuing operations. Excludes cash and cash equivalents associated with the disposal group (and discontinued operation).

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