Debt - Additional Information - Related Party Notes Payable (Details)
$ in Thousands
12 Months Ended
Dec. 31, 2018
USD ($)
Property
loan
Weighted Average  
Debt Instrument [Line Items]  
Weighted average contractual interest rate 5.26%
Weighted average remaining term 2 years 11 months
Related party notes payable  
Debt Instrument [Line Items]  
Outstanding principal of related parties notes payable $ 27,890
Related party notes payable | Weighted Average  
Debt Instrument [Line Items]  
Weighted average contractual interest rate 1.00%
Weighted average remaining term 9 years 2 months
Mortgage Loans Payable | Affiliated Entity | Related party notes payable  
Debt Instrument [Line Items]  
Number of mortgage loans with related party | loan 4
Number of properties with related party | Property 6
Outstanding principal of related parties notes payable $ 27,900
Mortgage Loans Payable | Affiliated Entity | Related party notes payable | Weighted Average  
Debt Instrument [Line Items]  
Weighted average contractual interest rate 1.00%
Weighted average remaining term 9 years 2 months