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Basis of Presentation and Recently Issued Accounting Pronouncements (Details) $ in Thousands | 3 Months Ended | 9 Months Ended |  |
--- | --- | --- | --- | ---
Sep. 30, 2017 USD ($) | Sep. 30, 2018 USD ($) | Sep. 30, 2017 USD ($) | Dec. 31, 2017 USD ($) | Dec. 31, 2016 USD ($)
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |  |  |
Net change in net cash used in investing activities |  |  | $ (71,402) | $ 256,683 |  |
Accounting Standards Update 2016-18 |  |  |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |  |  |
Net change in net cash used in investing activities |  |  |  | 4,092 |  |
Restricted cash |  |  |  |  |  | $ 6,650
Distributions in excess of accumulated net income | Accounting Standards Update 2017-05 |  |  |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |  |  |
Adjustment to retained earnings |  |  |  |  | $ 12,756 |
Distributions in excess of accumulated net income | Accounting Standards Update 2016-02 |  |  |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |  |  |
Lease asset |  |  | 3,000 |  |  |
Lease liability |  |  | $ 3,000 |  |  |
Distributions in excess of accumulated net income | Accounting Standards Update 2016-02 | Discount Rate |  |  |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |  |  |
Fair value inputs, discount rate (percent) |  |  | 0.044 |  |  |
Restatement Adjustment | Accounting Standards Update 2016-18 |  |  |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |  |  |
Net change in net cash used in investing activities |  |  |  | (6,650) |  |
Restatement Adjustment | Accounting Standards Update 2017-05 |  |  |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |  |  |
Adjustment to retained earnings |  |  |  |  | 12,756 |
Restatement Adjustment | General and Administrative Expense |  |  |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |  |  |
Reclassification of non-recoverable payroll |  | $ (1,019) |  | (2,846) |  |
Restatement Adjustment | Property Operating Expense |  |  |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |  |  |
Reclassification of non-recoverable payroll |  | $ 912 |  | $ 1,827 |  |
Restatement Adjustment | Distributions in excess of accumulated net income | Accounting Standards Update 2017-05 |  |  |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |  |  |
Adjustment to retained earnings | [1] |  |  |  | $ 12,756 |
[1] | See Note 2. Recently Issued Accounting Pronouncements Adopted.

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