Discontinued Operations (Summary Of The Financial Information For The Discontinued Operations) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 31, 2011	Sep. 30, 2011	Jun. 30, 2011	Mar. 31, 2011	Dec. 31, 2010	Sep. 30, 2010	Jun. 30, 2010	Mar. 31, 2010	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Discontinued Operations and Disposal Groups [Abstract]
Revenue from discontinued operations	$ 93	$ 163	$ 1,048	$ 978	$ 1,627	$ 618	$ 619	$ 669	$ 2,300	$ 3,500	$ 2,700
Income from discontinued operations									$ 957	$ 976	$ 1,249