Related Party Arrangements (Details) - USD ($)	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Related Party Arrangements
Management, development and other fees	$ 6,333,000	$ 3,084,000	$ 3,819,000
Compensation expense	34,131,000	25,100,000	21,110,000
Property and construction management roles
Related Party Arrangements
Outstanding receivables	2,855,000	3,964,000
Non-employee directors
Related Party Arrangements
Payable to related parties	100,000
Payable to related parties in quarterly installments	25,000
Non-employee directors | Restricted stock and deferred stock awards
Related Party Arrangements
Payable to related parties	175,000
Compensation expense	2,228,000	1,981,000	1,819,000
Amount of deferred compensation	794,000	$ 696,000	$ 614,000
Lead Independent Director
Related Party Arrangements
Payable to related parties	35,000
Payable to related parties in quarterly installments	8,750
Non-employee director serving as the chairperson of the Audit Committee
Related Party Arrangements
Payable to related parties	30,000
Payable to related parties in quarterly installments	7,500
Non-employee director serving as a chairperson of the Compensation Committee
Related Party Arrangements
Payable to related parties	25,000
Payable to related parties in quarterly installments	6,250
Non-employee director serving as a chairperson of the Nominating and Corporate Governance and Investment and Finance Committees
Related Party Arrangements
Payable to related parties	20,000
Payable to related parties in quarterly installments	$ 5,000