Subsequent Events Subsequent Events (Details) - Subsequent Event - USD ($)	Aug. 09, 2018	Aug. 06, 2018
Variable Interest Entity, Primary Beneficiary, Aggregated Disclosure | 700 W Chicago LLC
Subsequent Event [Line Items]
Fair Value of Land Contributed		$ 53,000,000
Carrying Value of Land Contributed		$ 22,000,000
Variable Interest Entity, Qualitative or Quantitative Information, Ownership Percentage		90.00%
Fox Purchase Agreement
Subsequent Event [Line Items]
Contract Termination Fee	$ 0