Basis Of Presentation And Summary Of Significant Accounting Policies (Reconciliation of Cash, Cash Equivalents and Restricted Cash) (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Basis Of Presentation And Summary Of Significant Accounting Policies [Abstract]
Cash and cash equivalents	$ 27,074	$ 69,083	$ 62,786
Restricted cash included in Land and building held for development, net	1,088	1,088	1,088	$ 1,100
Cash and cash equivalents and restricted cash at the end of the period	$ 28,162	$ 70,171	$ 63,874	$ 38,467