Fair Value Of Financial Instruments (Schedule Of Assets And Liabilities Measured On A Recurring Basis) (Details) (USD $)	Mar. 31, 2014	Dec. 31, 2013	Mar. 31, 2013	Dec. 31, 2012
Fair Value, Inputs, Level 1 [Member]
Available-for-sale Securities	$ 13,438,000	$ 12,650,000
Fair Value, Inputs, Level 2 [Member]
Cash Flow Hedge Derivative Instrument Assets at Fair Value	377,000	975,000
Cash Flow Hedge Derivative Instrument Liabilities at Fair Value	986,000	0
Fair Value, Inputs, Level 3 [Member]
Business Combination, Contingent Consideration, Liability	$ 4,000,000	$ 2,600,000	$ 4,256,000	$ 4,256,000