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Summary of Significant Accounting Policies and New Accounting Pronouncements Properties and Equipment, Net (Details)
12 Months Ended
Dec. 31, 2015
Minimum [Member]  
Property, Plant and Equipment [Line Items]  
Estimated useful lives of properties and equipment 3 years
Maximum [Member]  
Property, Plant and Equipment [Line Items]  
Estimated useful lives of properties and equipment 40 years