Quarterly report pursuant to Section 13 or 15(d)

Recent Transactions (Schedule Of Disposed Developable Land) (Details)

v3.20.1
Recent Transactions (Schedule Of Disposed Developable Land) (Details) - Disposal Group, Not Discontinued Operations [Member]
$ in Thousands
 3 Months Ended
Mar. 31, 2020
USD ($)
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]  
Net Sales Proceeds $ 15,992
Net Carrying Value 11,179
Realized Gains (losses)/Unrealized Losses, net 4,813
230 & 250 Half Mile Road [Member]  
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]  
Net Sales Proceeds 7,018
Net Carrying Value 2,969
Realized Gains (losses)/Unrealized Losses, net 4,049
Capital Office Park Land [Member]  
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]  
Net Sales Proceeds 8,974
Net Carrying Value 8,210
Realized Gains (losses)/Unrealized Losses, net $ 764