Basis of Presentation and Summary of Significant Accounting Policies - Estimated Useful Lives of Real Estate Investments (Detail)	12 Months Ended
	Dec. 31, 2016
Minimum | Buildings and Building Improvements
Property Subject to or Available for Operating Lease [Line Items]
Depreciable lives	20 years
Minimum | Land Improvements
Property Subject to or Available for Operating Lease [Line Items]
Depreciable lives	10 years
Minimum | Fixtures and Integral Equipment
Property Subject to or Available for Operating Lease [Line Items]
Depreciable lives	3 years
Maximum | Buildings and Building Improvements
Property Subject to or Available for Operating Lease [Line Items]
Depreciable lives	40 years
Maximum | Land Improvements
Property Subject to or Available for Operating Lease [Line Items]
Depreciable lives	20 years
Maximum | Fixtures and Integral Equipment
Property Subject to or Available for Operating Lease [Line Items]
Depreciable lives	20 years