Income Tax Considerations (Schedule Of Income Tax Provision) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Income Tax Disclosure [Abstract]
Net (loss) income before taxes of taxable REIT subsidiary	$ (989)	$ 1,446	$ 10,688
Federal (benefit) provision at statutory rate of 35%	(346)	506	3,741
Valuation allowance (decrease) increase	(309)	(3,003)	2,165
Other	6	(149)	98
Federal income tax (benefit) provision of taxable REIT subsidiary	(649)	(2,646)	6,004
Texas franchise tax	701	1,403	1,370
Total	$ 52	$ (1,243)	$ 7,374