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Basis of Presentation and Recently Issued Accounting Pronouncements (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended |  |
--- | --- | --- | --- | ---
Jun. 30, 2017 | Jun. 30, 2018 | Jun. 30, 2017 | Dec. 31, 2017 | Dec. 31, 2016
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |  |  |
Net change in net cash used in investing activities |  |  | $ (22,779) | $ 18,858 |  |
Accounting Standards Update 2016-18 |  |  |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |  |  |
Net change in net cash used in investing activities |  |  |  | 42,150 |  |
Restricted cash |  | $ 11,450 |  | 11,450 | $ 0 | $ 6,650
Accounting Standards Update 2017-05 |  |  |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |  |  |
Adjustment to retained earnings |  |  |  |  | 12,756 |
General and Administrative Expense | Restatement Adjustment |  |  |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |  |  |
Reclassification of non-recoverable payroll |  | (912) |  | (1,827) |  |
Property Operating Expense | Restatement Adjustment |  |  |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |  |  |
Reclassification of non-recoverable payroll |  | $ 912 |  | 1,827 |  |
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 |
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 |  |  |  | $ (4,800) |  |
[1] | See Note 2. Recently Issued Accounting Pronouncements Adopted.

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