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Financial Instruments (Details Textual) - Sep. 30, 2015
CAD in Millions, AUD in Millions, $ in Millions
USD ($)
CAD
AUD
Forward Exchange Contracts, Australian [Member]      
Financial Instruments [Line Items]      
Forward Exchange Contracts Outstanding $ 6.1   AUD 8.6
Forward Exchange Contracts, Canadian [Member]      
Financial Instruments [Line Items]      
Forward Exchange Contracts Outstanding $ 4.2 CAD 5.0