Summary of Significant Accounting Policies (Details)	12 Months Ended
	Dec. 31, 2021 USD ($) Employee Segment Property Room	Dec. 31, 2020 USD ($)	Dec. 31, 2019 USD ($)
Summary Of Significant Accounting Policies [Line Items]
Document Period End Date	Dec. 31, 2021
Number of employees | Employee	208
Number of office, retail, multifamily and mixed-use operating properties | Property	30
Properties held for development | Property	3
Allowance for doubtful accounts	$ (4,600,000)	$ (10,000,000)
Total bad debt expense	2,300,000	18,400,000	$ 1,800,000
Real estate depreciation expense	$ 102,000,000	95,800,000	85,300,000
Short term liquid investments, initial maturity	3 months
Cash balance at banks, federally insured amount	$ 250,000
Cash balance at banks, excess of FDIC insured limit	62,200,000	33,000,000
Restricted cash	0	1,716,000	10,148,000
Incremental stock compensation cost from modification	$ 2,600,000	1,200,000	0
Number of operating segments | Segment	4
Rooms in mixed-use segment all-suite hotel | Room	369
Right-of-use asset, net	$ 26,254,000	29,350,000
Straight-line rent liability	14,274,000	18,049,000
Lease liability	27,917,000	30,060,000
Money Market Funds
Summary Of Significant Accounting Policies [Line Items]
Cash balance at banks, excess of FDIC insured limit	$ 70,800,000	97,800,000
Minimum
Summary Of Significant Accounting Policies [Line Items]
Percentage of taxable income required to distribute to qualify as real estate investment trust (REIT)	90.00%
Building And Improvement | Minimum
Summary Of Significant Accounting Policies [Line Items]
Real Estate, estimated useful lives	30 years
Building And Improvement | Maximum
Summary Of Significant Accounting Policies [Line Items]
Real Estate, estimated useful lives	40 years
Furniture And Equipment | Minimum
Summary Of Significant Accounting Policies [Line Items]
Real Estate, estimated useful lives	3 years
Furniture And Equipment | Maximum
Summary Of Significant Accounting Policies [Line Items]
Real Estate, estimated useful lives	15 years
Other Income
Summary Of Significant Accounting Policies [Line Items]
General excise tax recognized, gross	$ 2,500,000	$ 2,300,000	$ 3,500,000