Quarterly report pursuant to Section 13 or 15(d)

Recent Transactions (Dispositions/Rental Property Held for Sale) (Narrative) (Details)

v3.19.1
Recent Transactions (Dispositions/Rental Property Held for Sale) (Narrative) (Details)
$ in Thousands
3 Months Ended
Mar. 31, 2019
USD ($)
ft²
item
property
Disposal Group, Not Discontinued Operations [Member]  
Real Estate Properties [Line Items]  
Unrealized losses on rental properties held for sale $ (2,500)
Number of properties sold | item 62
Paramus, New Jersey [Member] | Disposal Group, Held-for-sale, Not Discontinued Operations [Member]  
Real Estate Properties [Line Items]  
Assets held for sale, Deferred charges and other assets $ 2,100
Assets held for sale, Unbilled rents receivable, net 1,900
Assets held for sale, Accounts payable, accrued expenses and other liabilities 1,200
Expected assets to be written off 3,700
Expected liabilities to be written off $ 100
Paramus, New Jersey [Member] | Disposal Group, Held-for-sale, Not Discontinued Operations [Member] | Office [Member]  
Real Estate Properties [Line Items]  
Area of property (in square feet) | ft² 348,000
Number of properties held for sale | property 1
Unrealized losses on rental properties held for sale $ 2,500
Estimated expected sales proceeds $ 36,900