Commitments and Contingencies (Details) $ in Thousands			9 Months Ended	31 Months Ended
	Mar. 29, 2018 ft²	Jan. 11, 2018 USD ($) a ft²	Aug. 31, 2018 USD ($) ft²	Aug. 31, 2018 USD ($)	Jun. 26, 2018 a	Jun. 01, 2018 USD ($)	Jan. 25, 2016 USD ($) a
Purchase and sale obligations
Area Of Building | ft²	234,000
Agreement to sell
Purchase and sale obligations
Purchase obligations							$ 7,700
Number of acres | a							280
Agreement Extension Fee				$ 260
Purchase agreement
Purchase and sale obligations
Purchase obligations		$ 3,600				$ 4,700
Area Of Building | ft²		156,000
Number of acres | a		14			36
Amended purchase agreement
Purchase and sale obligations
Purchase obligations		$ 3,100
Obligations For Investments In Real Estate Assets
Purchase and sale obligations
Purchase obligations			$ 1,977	$ 1,977
Area Of Building | ft²			134,000