Leases (Details Textual) $ in Thousands	12 Months Ended
	Dec. 31, 2020 USD ($)	Dec. 31, 2019 USD ($)	Dec. 31, 2018 USD ($)	Jan. 01, 2021 USD ($) Property
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]
Total lease liability	$ 55,369
Commercial lease [Member]
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]
Lease, existence of option to extend	true
Residential Lease [Member]
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]
Lease, existence of option to extend	false
Weighted average remaining term	8 months 15 days
Lease, option to extend	Generally, our residential leases do not provide extension options
Redevelopment Property [Member] | Subsequent Event [Member]
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]
Number of leased property | Property				4
Future lease payment expected in 2021				$ 25,300
Ground and Office Leases [Member]
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]
Lease cost	$ 8,000
Lease cost		$ 10,700	$ 5,100
Ground Lease [Member]
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]
Weighted average remaining term	73 years 3 months 18 days
Operating lease, weighted average discount rate, percent	6.60%
Total lease liability	$ 44,200
Office Lease [Member]
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]
Weighted average remaining term	7 years 7 months 6 days
Operating lease, weighted average discount rate, percent	3.60%