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Related Party Transactions and Arrangements - Additional Information (Detail) |  | 1 Months Ended | 3 Months Ended | 12 Months Ended
--- | --- | --- | --- | ---
Oct. 05, 2016 shares | Jun. 30, 2017 USD ($) Property | Jun. 30, 2016 USD ($) Property | Dec. 31, 2018 USD ($) Property shares | Dec. 31, 2017 USD ($) Property shares | Dec. 31, 2016 USD ($)
Related Party Transaction [Line Items] |  |  |  |  |  |
Asset management fees earned |  |  |  | $ 6,963,000 | $ 6,006,000 | $ 4,847,000
Dividends paid, common stock |  |  |  | $ 63,409,000 | $ 53,246,000 | 37,880,000
Number of property acquired | Property |  |  |  | 2,379 | 2,340 |
Acquisition of real estate properties |  |  |  | $ 215,833,000 | $ 221,813,000 | 1,000,000
Common Shares |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |
Common stock repurchased and retired shares | shares |  |  |  | 38,712,000 | 59,631,000 |
R A I T Financial Trust |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |
Dividends paid, common stock |  |  |  | $ 0 | $ 0 | 3,926,000
Repayment of term loan facility |  |  | $ 38,075,000 |  |  |
Number of property dispositions | Property |  |  | 2 |  |  |
R A I T Financial Trust | Common Shares |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |
Common stock repurchased and retired shares | shares | 7,269,719 |  |  |  |  |
Management Expenses | R A I T Financial Trust |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |
Asset management fees earned |  |  |  | 63,000 | 257,000 | 0
Former Advisor |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |
Incentive fee earned by the former advisor |  |  |  | 0 | 0 | 350,000
Former Advisor | Shares Services Agreement |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |
Cost incurred for service provided |  |  |  | $ 0 | 727,000 | 0
Term of agreement |  |  |  | December 21, 2016 to June 20, 2017 |  |
Former Advisor | Management Expenses |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |
Asset management fees earned |  |  |  | $ 0 | 0 | 7,092,000
Property Manager |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |
Property management and leasing fees |  |  |  | 0 | 0 | 4,769,000
Sponsor | R A I T Financial Trust |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |
Total interest expense paid |  |  |  | $ 0 | $ 0 | $ 361,000
R A I T Financial Trust | North Carolina |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |
Number of property acquired | Property |  | 328 |  |  |  |
Acquisition of real estate properties |  | $ 42,950,000 |  |  |  |

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