Income Tax Considerations (Schedule Of Income Tax Provision) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013		Dec. 31, 2012		Dec. 31, 2011
Income Tax Note [Line Items]
Net income (loss) before taxes of taxable REIT subsidiary	$ 10,688		$ (12,894)		$ (32,043)
Federal provision (benefit) at statutory rate of 35%	3,741		(4,513)		(11,215)
Valuation allowance increase	2,165		3,781		8,776
Other	98		(705)		1,523
Federal income tax provision (benefit) of taxable REIT subsidiary	6,004	[1]	(1,437)	[1]	(916)	[1]
Texas franchise tax	1,370	[2]	1,784	[2]	1,373	[2]
Total	$ 7,374		$ 347		$ 457

[1] All periods presented are open for examination by the IRS.

[2] For all periods presented, amounts include the effects that are reported in discontinued operations. See Note 15 for additional information.