Stock-based Compensation (Summary of Unrecognized Compensation Expense) (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2021 USD ($)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized compensation expense	$ 20,195
Weighted-Average Remaining Contractual Term	1 year 6 months
OP Units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized compensation expense	$ 13,460
Weighted-Average Remaining Contractual Term	1 year 3 months 18 days
OPPs
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized compensation expense	$ 5,104
Weighted-Average Remaining Contractual Term	2 years
AO LTIP Units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized compensation expense	$ 565
Weighted-Average Remaining Contractual Term	1 year 2 months 12 days
Vornado stock options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized compensation expense	$ 489
Weighted-Average Remaining Contractual Term	1 year 4 months 24 days
Vornado restricted stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized compensation expense	$ 483
Weighted-Average Remaining Contractual Term	1 year 4 months 24 days
Performance Conditioned AO LTIP Units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized compensation expense	$ 94
Weighted-Average Remaining Contractual Term	1 year