Goodwill And Intangible Assets (Schedule Of Intangible Assets) (Details) (USD $)	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012	Mar. 31, 2013 Customer Relationships [Member]	Dec. 31, 2012 Customer Relationships [Member]
Finite-Lived Intangible Assets [Line Items]
Amortization expense	$ 600,000	$ 800,000
Gross Carrying Amount			23,088,000	23,088,000
Accumulated Amortization			$ 12,680,000	$ 12,091,000