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Capital (Tables) | 9 Months Ended
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Sep. 30, 2018
Equity [Abstract] |
Summary of Common Shares Outstanding [Table Text Block] | Detailed below is a roll forward of the Company's common shares outstanding for the three- and nine-month periods ended September 30, 2018 and 2017:
|  | Three-Month Period Ended September 30, |  | Nine-Month Period Ended September 30,
|  | 2018 |  | 2017 |  | 2018 |  | 2017
Common Shares Outstanding (6/30/2018, 6/30/2017, 12/31/2017, and 12/31/2016, respectively) |  | 12,712,050 |  |  | 12,367,598 |  |  | 13,340,217 |  |  | 9,130,897 |
Share Activity: |  |  |  |  |  |  |  |
Shares issued |  | — |  |  | 958,230 |  |  | — |  |  | 4,194,968 |
Restricted shares issued |  | 13,144 |  |  | 9,976 |  |  | 13,144 |  |  | 9,976 |
Shares repurchased |  | (21,720 | ) |  | — |  |  | (649,887 | ) |  | — |
Forfeiture of common shares to satisfy tax withholding obligations |  | — |  |  | — |  |  | — |  |  | (37 | )
Common Shares Outstanding (9/30/2018, 9/30/2017, 9/30/2018, and 9/30/2017, respectively) |  | 12,703,474 |  |  | 13,335,804 |  |  | 12,703,474 |  |  | 13,335,804 |
Unvested restricted shares outstanding (9/30/2018, 9/30/2017, 9/30/2018, and 9/30/2017, respectively) |  | 19,113 |  |  | 16,515 |  |  | 19,113 |  |  | 16,515 |
Vesting schedule for restricted shares [Table Text Block] | The below table provides details on the Company's restricted shares granted pursuant to share award agreements which are unvested at September 30, 2018:
Grant Recipient |  | Number of Restricted Shares Granted |  | Grant Date |  | Vesting Date(1)
Independent trustees: |  |  |  |  |  |
|  | 13,144 |  |  | September 12, 2018 |  | September 11, 2019
Partially dedicated employees: |  |  |  |  |  |
|  | 2,630 |  |  | December 12, 2017 |  | December 12, 2018
|  | 1,783 |  |  | December 12, 2017 |  | December 12, 2019
|  | 1,556 |  |  | December 13, 2016 |  | December 13, 2018
(1) | Date at which such restricted shares will vest and become non-forfeitable.

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