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Long-Term Debt (Schedule of Long-term Debt) (Details) In Thousands, unless otherwise specified	Sep. 30, 2012 USD ($)	Sep. 30, 2012 CAD	Dec. 31, 2011 USD ($)	Sep. 30, 2012 BMO Credit Agreement [Member] USD ($)	Dec. 31, 2011 BMO Credit Agreement [Member] USD ($)	Sep. 30, 2012 Edmonton Mortgage [Member] USD ($)	Dec. 31, 2011 Edmonton Mortgage [Member] USD ($)
Debt Instrument [Line Items]
Long-term Debt, Total	$ 3,730	3,669	$ 9,100	$ 3,730	$ 0	$ 0	$ 9,100
Less: current maturities of long-term debt obligations	(408)		(9,100)
Long-term debt, less current portion	$ 3,322		$ 0

Carrying amount of long-term debt, net of unamortized discount or premium, including current and noncurrent amounts. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

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