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Summary Of Significant Accounting Policies (Schedule Of Diluted Earnings Per Share Computed Using Weighted Average Common And Potentially Dilutive Common Equivalent Shares Outstanding) (Details)
 3 Months Ended 12 Months Ended
Dec. 31, 2013
Sep. 30, 2013
Jun. 30, 2013
Mar. 31, 2013
Dec. 31, 2012
Sep. 30, 2012
Jun. 30, 2012
Mar. 31, 2012
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Accounting Policies [Abstract]                      
Weighted average shares outstanding used to compute basic earnings per share 32,222,000 32,201,000 32,187,000 32,076,000 32,016,000 32,052,000 32,051,000 32,010,000 32,171,751 32,032,343 31,931,962
Incremental shares attributable to stock options and restricted stock                 427,528 160,233 281,212
Shares used to compute diluted earnings per share 32,622,000 32,658,000 32,635,000 32,480,000 32,176,000 32,101,000 32,101,000 32,393,000 32,599,279 32,192,576 32,213,174