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Noncontrolling Interest (Tables) | 9 Months Ended | 12 Months Ended
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Sep. 30, 2018 | Dec. 31, 2017
Noncontrolling Interest [Line Items] |  |
Redeemable Noncontrolling Interest [Table Text Block] | The following summarizes the activity for noncontrolling interests for the nine months ended September 30, 2018 and the year ended December 31, 2017:
| Nine Months Ended September 30, 2018 |  | Year Ended December 31, 2017
Beginning balance | $ | 76 |  |  | $ | 84 |
Issuance of limited partnership units | 1,185 |  |  | — |
Distributions to noncontrolling interests | (50 | ) |  | (11 | )
Net (loss) income allocation | (1 | ) |  | 3 |
Other comprehensive loss | (2 | ) |  | — |
Ending balance | $ | 1,208 |  |  | $ | 76 |
| The following summarizes the activity for noncontrolling interests for the years ended December 31, 2017, 2016 and 2015:
| Year Ended December 31,
| 2017 |  | 2016 |  | 2015
Beginning balance | $ | 84 |  |  | $ | 98 |  |  | $ | 139 |
Distributions to noncontrolling interests | (11 | ) |  | (11 | ) |  | (11 | )
Net income (loss) | 3 |  |  | (3 | ) |  | (30 | )
Ending balance | $ | 76 |  |  | $ | 84 |  |  | $ | 98 |

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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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- Definition Tabular disclosure of redeemable noncontrolling interest (as defined) included in the statement of financial position as either a liability or temporary equity. As of the date of the statement of financial position, such redeemable noncontrolling interest is currently redeemable, as defined, for cash or other assets of the entity at (1) at a fixed or determinable price on a fixed or determinable date, (2) at the option of the holder of the noncontrolling interest, or (3) upon occurrence of an event that is not solely within the control of the entity. + References No definition available. + Details
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