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Accounts Payable And Accrued Liabilities (Schedule Of Current Liabilities) (Details) (USD $)
In Thousands, unless otherwise specified
Sep. 30, 2013
Jun. 30, 2013
Accounts Payable and Accrued Liabilities [Abstract]    
Accounts payable-trade $ 10,190 $ 8,776
Accrued salaries and commissions 43,844 50,568
Accrued liabilities 115,674 120,981
Amounts payable in respect of restructuring and other Special charges (note 16) 7,724 7,130
Asset retirement obligations 971 988
Accounts payable and accrued liabilities $ 178,403 $ 188,443