Income Taxes (Schedule Of Components Of Deferred Tax Assets And Liabilities) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017		Dec. 31, 2016
Income Taxes [Abstract]
Net operating loss carry forwards	$ 8,579	[1]	$ 11,940
Alternative minimum tax credit carry-forwards	939	[1]	1,690
Compensation and employee benefits	4,146	[1]	6,221
Deferred revenue	2,500	[1]	5,486
Accrued expenses	6,178	[1]	7,134
Accrued taxes	2,440	[1]	3,381
Land and property	8,457	[1]	12,857
Other	107	[1]	995
Total Deferred Tax Assets	33,346	[1]	49,704
Intangibles	(1,087)	[1]	(1,482)
Cancellation of indebtedness	(481)	[1]	(1,559)
Notes receivable			(7,403)
Total Deferred Tax Liabilities	(1,568)	[1]	(10,444)
Net deferred tax assets before valuation allowance	31,778	[1]	39,260
Valuation allowance	(6,870)	[1]	(10,593)
Net deferred tax asset	$ 24,908	[1]	$ 28,667
Federal tax rate	35.00%

[1] We recorded an adjustment to our federal deferred income tax assets and liabilities as of December 31, 2017 to reflect the reduction in the U.S. statutory federal corporate income tax rate from 35% to 21% resulting from the Tax Act.