Goodwill And Intangible Assets (Narrative) (Details) (USD $)	3 Months Ended
	Mar. 31, 2012	Mar. 31, 2011	Dec. 31, 2011
Goodwill And Intangible Assets
Amortization of intangible assets	$ 314,000	$ 302,000
Estimated amortization of intangible assets, remainder of current year	980,000
Estimated amortization of intangible assets, Year One	1,303,000
Estimated amortization of intangible assets, Year Two	1,298,000
Estimated amortization of intangible assets, Year Three	1,297,000
Estimated amortization of intangible assets, Year Four	703,000
Estimated amortization of intangible assets, Year Five	44,000
Estimated amortization of intangible assets, thereafter	176,000
Finite-Lived Intangible Assets, Weighted-Average Useful Life	4.7
Non-amortizable intangible assets related to restrictive covenant arrangements	$ 9,025,000		$ 9,300,000