XML 44 R31.htm IDEA: XBRL DOCUMENT v3.20.1
Summary Of Significant Accounting Policies (Narrative) (Details)
Mar. 31, 2020
Summary Of Significant Accounting Policies [Line Items]  
Number of VIEs 6
Number of VIEs - Total 7
Total Office Properties [Member]  
Summary Of Significant Accounting Policies [Line Items]  
Number of VIEs 5