Discontinued Operations (Schedule Of Income From Discontinued Operations) (Details) (USD $)	3 Months Ended		6 Months Ended
	Jun. 30, 2011	Jun. 30, 2010	Jun. 30, 2011	Jun. 30, 2010
Revenues	$ 1,211,000	$ 1,300,000	$ 2,440,000	$ 2,816,000
Depreciation			5,832,000	5,452,000
General and administrative		(14,000)		(14,000)
Income from operations - discontinued	1,211,000	1,242,000	2,440,000	2,687,000
Segment, Discontinued Operations [Member]
Depreciation		72,000		143,000
Discontinued Operations - Fundamental Facilities [Member]
Income from operations - discontinued	$ 1,211,000	$ 1,242,000	$ 2,440,000	$ 2,687,000