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Summary of Significant Accounting Policies - Property and Equipment (Details)
12 Months Ended
Dec. 31, 2015
Minimum | Building  
Property, Plant and Equipment [Line Items]  
Property, plant and equipment useful life (in years) 20 years
Minimum | Furniture, Fixtures, and Equipment  
Property, Plant and Equipment [Line Items]  
Property, plant and equipment useful life (in years) 3 years
Maximum | Building  
Property, Plant and Equipment [Line Items]  
Property, plant and equipment useful life (in years) 30 years
Maximum | Furniture, Fixtures, and Equipment  
Property, Plant and Equipment [Line Items]  
Property, plant and equipment useful life (in years) 25 years