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Long - term Debt (Details Textual) (USD $) In Millions, unless otherwise specified	9 Months Ended
	Sep. 30, 2012	Dec. 31, 2011
Long-Term Debt (Textual) [Abstract]
Promissory note	$ 34.0	$ 35.0
Promissory note [Member]
Long-Term Debt (Textual) [Abstract]
Promissory note	10.0	15.0
Promissory note, repaid	$ 5.0

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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