Mortgages and Notes Payable - Additional Information (Detail) $ in Thousands |
3 Months Ended | 6 Months Ended | 12 Months Ended | ||
|---|---|---|---|---|---|
|
Jun. 30, 2017
USD ($)
Mortgage
|
Jun. 30, 2016
USD ($)
|
Jun. 30, 2017
USD ($)
Mortgage
|
Jun. 30, 2016
USD ($)
|
Dec. 31, 2016
USD ($)
Mortgage
|
|
| Debt Disclosure [Abstract] | |||||
| Investment in rental property pledges as collateral | $ 107,959 | $ 107,959 | |||
| Number of mortgages extinguished | Mortgage | 5 | 5 | 4 | ||
| Mortgage extinguished | $ 37,354 | $ 8,199 | |||
| Cost of extinguishment | $ 12 | $ 53 | $ 60 | $ 53 | |