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Related Party Transactions - Narrative (Details) $ in Thousands, ft² in Millions |  | 1 Months Ended | 3 Months Ended |
--- | --- | --- | --- | ---
Sep. 20, 2017 USD ($) shares | Feb. 28, 2019 USD ($) | Mar. 31, 2019 USD ($) ft² shares | Mar. 31, 2018 USD ($) | Dec. 31, 2018 USD ($)
Related Party Transaction [Line Items] |  |  |  |  |
Area of real estate property (in sqft) | ft² |  |  | 7.3 |  |
Incurred |  |  | $ 5,805 | $ 5,966 |
Real estate property |  |  | $ 1,182,342 |  | $ 1,182,214
Class T |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |
Outstanding shares owned by affiliates (shares) | shares |  |  | 280 |  |
Stockholder servicing fee |  |  | 0.00274% |  |
Class S |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |
Outstanding shares owned by affiliates (shares) | shares |  |  | 280 |  |
Stockholder servicing fee |  |  | 0.00274% |  |
Class D |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |
Outstanding shares owned by affiliates (shares) | shares |  |  | 283 |  |
Stockholder servicing fee |  |  | 0.00068% |  |
Class I |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |
Outstanding shares owned by affiliates (shares) | shares |  |  | 283,016 |  |
Class A |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |
Outstanding shares owned by affiliates (shares) | shares |  |  | 287,449 |  |
The Advisor |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |
Due from related parties |  |  | $ 1,300 |  |
Shares sold to Advisor | $ 2,500 |  |  |  |
The Advisor | Class T |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |
Shares sold to Advisor (shares) | shares | 264 |  |  |  |
The Advisor | Class S |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |
Shares sold to Advisor (shares) | shares | 264 |  |  |  |
The Advisor | Class D |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |
Shares sold to Advisor (shares) | shares | 264 |  |  |  |
The Advisor | Class I |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |
Shares sold to Advisor (shares) | shares | 263,200 |  |  |  |
Organizational and offering costs advanced by the Advisor |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |
Incurred |  |  | $ 3 | 240 |
Advisory Agreement | Class T |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |
Stockholder servicing fee |  |  | 0.00342% |  |
Performance distribution allocation |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |
Percentage of performance distribution allocation |  |  | 12.50% |  |
Performance Distribution, Hurdle Rate, Annualized Rate Of Return On Net Asset Value |  |  | 5.50% |  |
Related party transaction |  | $ 3,900 |  |  |
Incurred |  |  | $ 1,920 | 2,061 |
Dealer Manager Agreement |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |
Underwriting compensation as percent of proceeds (percent) |  |  | 10.00% |  |
Dealer Manager Agreement | Class T |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |
Stockholder servicing fee |  |  | 0.00274% |  |
Dealer Distribution Fee | Class T |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |
Stockholder servicing fee |  |  | 0.00068% |  |
Advisor Distribution Fee | Class T |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |
Stockholder servicing fee |  |  | 0.00205% |  |
Reimbursement, Services Provided That Are not Entitled to Advisor Fees | The Advisor |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |
Incurred |  |  | $ 200 | 150 |
Reimbursement, Reimbursible Expenses |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |
Average invested assets for preceding 12 months (percent) |  |  | 2.00% |  |
Percentage of Company's net income before addition of reserves (percent) |  |  | 25.00% |  |
Reimbursement, Reimbursible Expenses | The Advisor |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |
Incurred |  |  | $ 0 | 10 |
Property management fees |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |
Incurred |  |  | $ 481 | $ 459 |
Property manager oversight fee as percent of gross revenues of property managed (percent) |  |  | 1.00% |  |
Limited partnership units | Performance distribution allocation |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |
Related party transaction |  | $ 3,900 |  |  |
Cash election under transaction agreement |  | 50.00% |  |  |

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