Annual report pursuant to Section 13 and 15(d)

Recent Transactions (Impairments) (Narrative) (Details)

v3.19.3.a.u2
Recent Transactions (Impairments) (Narrative) (Details)
Dec. 31, 2019
property
Conshohocken And Bala Cynwyd, Pennsylvania [Member]  
Real Estate Properties [Line Items]  
Number of real estate properties 2