Income Taxes (Schedule Of Components Of Deferred Tax Assets And Liabilities) (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Income Taxes [Abstract]
Net operating loss carry-forwards	$ 21,498	$ 9,398
Alternative minimum tax credit carry-forwards		661
Foreign Tax Credit	3,743	3,114
Compensation and employee benefits	3,255	3,731
Deferred revenue	2,552	2,912
Accrued expenses	9,691	4,385
Accrued taxes	2,313	2,193
Lease Obligations	64,859	68,320
Land and property	4,842	7,886
Total Deferred Tax Assets	112,753	102,600
Lease liabilities	(60,886)	(64,551)
Intangibles	(429)	(352)
Other	(1,020)	(307)
Total Deferred Tax Liabilities	(62,335)	(65,210)
Net deferred tax assets before valuation allowance	50,418	37,390
Valuation allowance	(47,056)	(33,946)
Net deferred tax asset	$ 3,362	$ 3,444