Summary of Significant Accounting Policies Tax (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Summary Of Significant Accounting Policies [Abstract]
State and local income, franchise and excise tax (benefit)	$ 1,148	$ 900	$ 915
Income and other tax expense (benefit)	$ 1,148	$ 900	$ 915
Tax Treatment Of Dividends And Distributions Ordinary Dividends	$ 1.85676	$ 1.75466	$ 1.40791
Tax Treatment Of Dividends And Distributions Long Term Capital Gain	0.57857	0.4285	0.73687
Tax Treatment Of Dividends And Distributions Unrecaptured Section Twelve Hundred And Fifty Gain	0.17717	0.29434	0.26522
Dividends and distributions declared per Common Share outstanding	$ 2.61250	$ 2.47750	$ 2.41000