Income Taxes (Summary Of Deferred Tax Assets And Liabilities) (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Income Tax Disclosure [Abstract]
Deferred Tax Assets, Tax Deferred Expense, Reserves and Accruals, Allowance for Doubtful Accounts	$ 5,883	$ 2,708
Deferred Tax Assets, Tax Deferred Expense, Compensation and Benefits	3,165	2,912
Deferred Tax Assets, Tax Deferred Expense, Compensation and Benefits, Pensions	1,784	1,912
Deferred Tax Assets, Tax Deferred Expense, Reserves and Accruals, Accrued Liabilities	2,218	1,196
Deferred Tax Assets, Other	4,543	8,570
Total Deferred Tax Assets	17,593	17,298
Deferred Tax Liabilities, Investments	11,637	3,709
Deferred Tax Liabilities, Other	9,158	6,920
Deferred Tax Liabilities, Gross	20,795	10,629
Deferred Tax Liabilities, Net	$ 3,202
Deferred tax asset, net		$ 6,669