Derivative financial instruments (Details)	6 Months Ended
Dec. 31, 2011
Derivative financial instruments (Textuals) [Abstract]
Maturities forward foreign exchange contracts	This subjects the Company to the risks associated with fluctuations in foreign currency exchange rates. The Company reduces this risk by utilizing natural hedging (i.e. offsetting receivables and payables) as well as by creating offsetting positions through the use of derivative financial instruments, primarily forward foreign exchange contracts with maturities of less than sixty days. The Company continues to have exposure to foreign currency risks to the extent they are not hedged.
Maturities of Foreign exchange contracts	less than 60 days

- Definition

Description of the reasons for holding or issuing derivative instruments and nonderivative hedging instruments. Includes discussion of the objectives for holding or issuing derivative instruments, the context needed to understand those objectives, and the strategies for achieving those objectives. The description generally distinguishes between derivative and nonderivative instruments by the types of hedging relationships and between those instruments used for risk management purposes and those used for other purposes. Information about those instruments is disclosed in the context of each instrument's primary underlying risk exposure (for example, interest rate, credit, foreign exchange rate, interest rate and foreign exchange rate, or overall price).

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