Mortgage Loans Payable, Net - Additional Information (Detail) |
Dec. 31, 2018
USD ($)
MortgageLoan
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Dec. 31, 2017
USD ($)
MortgageLoan
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Dec. 31, 2016
USD ($)
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SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items] | |||||||
Mortgage loans payable, gross | $ 17,256,000 | $ 11,634,000 | |||||
Mortgage loans payable, net(1) | $ 16,892,000 | [1] | $ 11,567,000 | [1] | $ 3,965,000 | ||
Weighted average effective interest rate | 4.25% | 3.45% | |||||
Number Of Fixed Rate Mortgage Loans Payable | MortgageLoan | 3 | 2 | |||||
Minimum [Member] | |||||||
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items] | |||||||
Debt Instrument, Interest Rate, Effective Percentage | 3.75% | 4.77% | |||||
Maximum [Member] | |||||||
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items] | |||||||
Debt Instrument, Interest Rate, Effective Percentage | 5.25% | 5.25% | |||||
Mortgage Loans Payable, Net [Member] | |||||||
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items] | |||||||
Weighted average effective interest rate | 4.51% | 4.92% | |||||
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