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Summary of Significant Accounting Policies - Narrative (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended |  |
--- | --- | --- | --- | ---
Jun. 30, 2018 | Jun. 30, 2017 | Jun. 30, 2018 | Jun. 30, 2017 | Jan. 01, 2018 | Dec. 31, 2017
Variable Interest Entity [Line Items] |  |  |  |  |  |
Costs related to shareholder activism | $ 19,369 | $ 0 | $ 19,369 | $ 0 |  |
Distributions in excess of co-venture obligation | 0 |  | 0 |  |  | $ 31,150
Financing arrangement obligation | 389,323 |  | 389,323 |  |  | 0
Accumulated deficit | $ (1,489,742) |  | (1,489,742) |  |  | $ (830,279)
Increase in net cash provided by investing activities |  |  | $ (266,135) | (190,775) |  |
ASU 2016-18 |  |  |  |  |  |
Variable Interest Entity [Line Items] |  |  |  |  |  |
Increase in net cash provided by investing activities |  |  |  | $ 353 |  |
Joint Venture | Chandler Freehold | Difference between revenue guidance in effect before and after topic 606 | ASU 2014-09 | Financing Arrangement |  |  |  |  |  |
Variable Interest Entity [Line Items] |  |  |  |  |  |
Financing arrangement obligation |  |  |  |  | $ 393,709 |
Accumulated deficit |  |  |  |  | 424,859 |
Joint Venture | Chandler Freehold |  |  |  |  |  |
Variable Interest Entity [Line Items] |  |  |  |  |  |
Distributions in excess of co-venture obligation |  |  |  |  | $ 31,150 |

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