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Segment Reporting (Details Textual) (USD $)
In Millions, unless otherwise specified
9 Months Ended
Sep. 30, 2012
Market
Segment Reporting (Textual) [Abstract]  
Number of major markets, segment reporting 2
United States [Member]
 
Segment Reporting Information [Line Items]  
Acquisition of goodwill and intangible assets 52.5