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Commitments and Contingencies (Tables) | 6 Months Ended
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Jun. 30, 2018
Commitments and Contingencies Disclosure [Abstract] |
Ground Lease Obligations | Future minimum lease payments due under the terms of these leases as of June 30, 2018, are as follows (dollars in thousands):
Period |  | Estimated Minimum Lease Payments Due(1)
For the remaining six months ending December 31: | 2018 |  | $ | 24 |
For the fiscal years ending December 31: | 2019 |  | 47 |
| 2020 |  | 47 |
| 2021 |  | 47 |
| 2022 |  | 30 |
| 2023 |  | 30 |
| Thereafter |  | 30 |
|  |  | $ | 255 |
(1) | Annual lease payments are set at the beginning of each year to then-current market rates (as determined by the State of Arizona). The amounts shown above represent estimated amounts based on the lease rates currently in place.

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- Definition Tabular disclosure of future minimum lease payments as of the date of the latest balance sheet presented, in aggregate and for each of the five years succeeding fiscal years, with separate deductions from the total for the amount representing executor costs, including any profit thereon, included in the minimum lease payments and for the amount of the imputed interest necessary to reduce the net minimum lease payments to present value. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=84164817&loc=d3e45280-112737 + Details
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