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Summary of Significant Accounting Policies - Estimated Useful Lives (Details)
6 Months Ended
Jun. 30, 2017
Building  
Property, Plant and Equipment [Line Items]  
Estimated useful life (in years) 40 years
Land improvements  
Property, Plant and Equipment [Line Items]  
Estimated useful life (in years) 15 years
Furniture and fixtures | Minimum  
Property, Plant and Equipment [Line Items]  
Estimated useful life (in years) 7 years
Furniture and fixtures | Maximum  
Property, Plant and Equipment [Line Items]  
Estimated useful life (in years) 10 years