Financial Instruments (Details) (USD $)	Jun. 30, 2011	Jun. 30, 2010
Derivatives, Fair Value [Line Items]
Notional Amount of outstanding exchange contract	$ 37,600,000
Financial Instruments (Textuals) [Abstract]
Fair value of fixed rate long-term debt	315,800,000	325,500,000
Contracts translated to US dollars [Member]
Derivatives, Fair Value [Line Items]
Notional Amount of outstanding exchange contract	37,600,000	9,400,000
Forward starting interest rate swap contracts [Member]
Derivatives, Fair Value [Line Items]
Notional Amount of outstanding exchange contract	150,000,000	75,000,000
Estimated Amount of payable on settlement of interest rate swap contracts	$ 2,400,000

Estimated Amount of payable on settlement of interest rate swap contracts.

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- Definition

Financial Instruments Textuals

+ Details

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- Definition

Estimated fair value of the debt instrument at the balance-sheet date.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 107
-Paragraph 10

+ Details

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- Definition

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.

+ Details

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- Definition

Aggregate notional amount of all derivatives designated as cash flow hedging instruments. The notional amount relates to a number of currency units, shares, bushels, pounds, or other units specified in a derivative instrument.

+ Details

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