Summary of Significant Accounting Policies - Summary of Estimated Useful Lives (Detail)	3 Months Ended
	Mar. 31, 2017
Buildings [Member] | Minimum [Member]
Property, Plant and Equipment [Line Items]
Estimated useful lives	25 years
Buildings [Member] | Maximum [Member]
Property, Plant and Equipment [Line Items]
Estimated useful lives	40 years
Building Improvements [Member] | Minimum [Member]
Property, Plant and Equipment [Line Items]
Estimated useful lives	10 years
Building Improvements [Member] | Maximum [Member]
Property, Plant and Equipment [Line Items]
Estimated useful lives	25 years
Integral Equipment, Furniture and Fixtures [Member]
Property, Plant and Equipment [Line Items]
Estimated useful lives	5 years