Discontinued Operations (Narrative) (Details) (USD $)	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012 Y	Sep. 30, 2011	Dec. 31, 2011
Discontinued Operations [Abstract]
Purchase price earn-out percent based on segment contracts			3.00%
Period of purchase price earn out payments (in years)			5
Disposal group purchase price earn Out as percent of segment contracts with continued occupancy of building			4.00%
Amount due ADI due to sale				$ 14,000	$ 14,000
Amount due from ADI due to sale			12,000		3,000
Other income under the earn out agreement	$ 2,000	$ 1,000	$ 9,000