Derivative Instruments and Hedging Activities (Summary of the Notional Amount and Fair Value of Derivatives) (Details)	Mar. 31, 2022 USD ($)	Feb. 28, 2022 USD ($)	Dec. 31, 2021 USD ($) numberOfLiborRate	Dec. 31, 2019 USD ($)	Dec. 31, 2018 USD ($)	Sep. 30, 2018 USD ($)
Fair value of derivative instruments
Total fair value derivative assets	$ 7,665,000		$ 1,257,000
Total fair value derivative liabilities	(7,613,000)		(26,452,000)
Total fair value derivatives, net	52,000		(25,195,000)
$700 Million loan due 2023
Fair value of derivative instruments
Face amount					$ 700,000,000
Construction Loans | 1700 Pavillion
Fair value of derivative instruments
Face amount			75,000,000
Construction Loans | Tanager Echo Development
Fair value of derivative instruments
Face amount			59,500,000
Term loan | $700 Million loan due 2023
Fair value of derivative instruments
Face amount					$ 615,000,000	$ 615,000,000
Victoria Place In Ward Village | Construction Loans
Fair value of derivative instruments
Face amount			$ 368,200,000
Number of new LIBOR interest rate caps | numberOfLiborRate			2
Two Summerlin
Fair value of derivative instruments
Face amount		$ 40,800,000
8770 New Trails | Construction Loans
Fair value of derivative instruments
Face amount				$ 35,500,000
Interest rate swap | Two Summerlin
Fair value of derivative instruments
Fixed interest rate		3.425%
Fixed Interest Rate 2.00%, Maturing September 2023 | Interest rate cap | Derivative instruments not designated as hedging instruments | Prepaid expenses and other assets, net
Fair value of derivative instruments
Notional amount, asset	$ 285,000,000
Fixed interest rate	2.00%
Total fair value derivative assets	$ 2,577,000		$ 300,000
Fixed Interest Rate 2.00%, Maturing September 2023 | Interest rate cap | Derivative instruments not designated as hedging instruments | Prepaid expenses and other assets, net
Fair value of derivative instruments
Notional amount, asset	$ 83,200,000
Fixed interest rate	2.00%
Total fair value derivative assets	$ 753,000		87,000
Fixed Interest Rate 5.00 Maturing October 2022 | Interest rate cap | Derivative instruments not designated as hedging instruments | Prepaid expenses and other assets, net
Fair value of derivative instruments
Notional amount, asset	$ 75,000,000
Fixed interest rate	5.00%
Total fair value derivative assets	$ 0		0
Fixed Interest Rate 2.50 Percent, Maturing September 2025, Notional 75Million | Interest rate cap | Derivative instruments not designated as hedging instruments | Prepaid expenses and other assets, net
Fair value of derivative instruments
Notional amount, asset	$ 75,000,000
Fixed interest rate	2.50%
Total fair value derivative assets	$ 1,862,000		485,000
Fixed Interest Rate 2.50 Percent, Maturing September 2025, Notional 59.5 Million | Interest rate cap | Derivative instruments not designated as hedging instruments | Prepaid expenses and other assets, net
Fair value of derivative instruments
Notional amount, asset	$ 59,500,000
Fixed interest rate	2.50%
Total fair value derivative assets	$ 1,477,000		385,000
Fixed Interest Rate 2.96%, Maturing September 2023 | Interest rate swap | Derivative instruments designated as hedging instruments: | Accounts payable and accrued expenses
Fair value of derivative instruments
Notional amount, liability	$ 615,000,000
Fixed interest rate	2.96%
Total fair value derivative liabilities	$ (7,193,000)		(23,477,000)
Fixed Interest Rate 3.43 Maturing January 2027 | Interest rate swap | Derivative instruments designated as hedging instruments: | Prepaid expenses and other assets, net
Fair value of derivative instruments
Notional amount, liability	$ 40,800,000
Fixed interest rate	3.43%
Total fair value derivative assets	$ 996,000
Total fair value derivative liabilities			0
Fixed Interest Rate 4.89 Maturing January 2032 | Interest rate swap | Derivative instruments designated as hedging instruments: | Accounts payable and accrued expenses
Fair value of derivative instruments
Notional amount, liability	$ 35,479,000
Fixed interest rate	4.89%
Total fair value derivative liabilities	$ (420,000)		$ (2,975,000)