Shareholders' Equity (Schedule of Restricted Stock And Cash Entitlements Expense) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Stockholders' Equity Note [Abstract]
Restricted Stock Expense	$ 1,051	$ 1,287	$ 1,355
Cash Entitlement Expense	995	639	718
Tax Effect	(531)	(499)	(542)
Net of Tax	$ 1,515	$ 1,427	$ 1,531