Discontinued Operations (Schedule Of Income From Discontinued Operations) (Details) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011
Revenues [Abstract]
Revenues	$ 1,247	$ 1,292	$ 2,470	$ 2,613
Operating Expenses [Abstract]
Depreciation	0	17	0	34
Income from operations - discontinued	1,247	1,275	2,470	2,579
Gain (Loss) on Sale of Properties, Net of Applicable Income Taxes	0	0	0	2,299
Income from discontinued operations	$ 1,247	$ 1,275	$ 2,470	$ 4,878
Earnings Per Share, Basic, Other Disclosures [Abstract]
Weighted Average Number of Shares Outstanding, Basic	27,792,834	27,708,136	27,784,469	27,702,432
Weighted Average Number of Shares Outstanding, Diluted	27,820,831	27,799,616	27,812,027	27,797,863
Earnings Per Share, Basic and Diluted [Abstract]
Income (Loss) from Discontinued Operations, Net of Tax, Per Basic Share	$ 0.05	$ 0.04	$ 0.09	$ 0.17
Discontinued operations	$ 0.05	$ 0.04	$ 0.09	$ 0.17