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Related Party Transactions - QIA (Details) - Q REIT Holding LLC - USD ($) |  | 12 Months Ended
--- | --- | ---
Aug. 23, 2016 | Dec. 31, 2018
Noncontrolling Interest [Line Items] |  |
Minimum interest required to be held by affiliate of QIA in order to purchase new equity securities | 5.00% |
Threshold of equity securities issuance where top up rights are exercisable | $ 1,000,000.0 |
Right to first offer to co-Invest, period (in months) |  | 30 months
JV partnership, term (in years) |  | 5 years
Extended term, if one joint venture transaction consummates (in days) |  | 30 months
Threshold to indemnify | 10.00% |

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