Income Taxes (Schedule Of Components Of Deferred Tax Assets And Liabilities) (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Income Taxes [Abstract]
Net operating loss carry forwards	$ 9,398	$ 8,199
Alternative minimum tax credit carry-forwards	661	1,117
Foreign Tax Credit	3,114	2,715
Compensation and employee benefits	3,731	3,906
Deferred revenue	2,912	2,266
Accrued expenses	4,385	7,126
Accrued taxes	2,193	2,086
Lease Obligations	68,320
Land and property	7,886	7,372
Total Deferred Tax Assets	102,600	34,787
Lease liabilities	(64,551)
Intangibles	(352)	(1,256)
Other	(307)	(367)
Total Deferred Tax Liabilities	(65,210)	(1,623)
Net deferred tax assets before valuation allowance	37,390	33,164
Valuation allowance	(33,946)	(6,720)
Net deferred tax asset	$ 3,444	$ 26,444