Quarterly report pursuant to Section 13 or 15(d)

Disposition of Property (Details)

Disposition of Property (Details) - Westbrook [Member] - Disposal Group, Disposed of by Sale, Not Discontinued Operations [Member]
ft² in Thousands, $ in Thousands
1 Months Ended
May 31, 2017
USD ($)
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]  
Area of Real Estate Property | ft² 290
Net proceeds from sale of assets $ 39,212
Gain on sale of assets $ 6,943