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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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Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
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Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 210
-Section S99
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