Earnings Per Share (Schedule Of Weighted Average Shares Outstanding) (Details)	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011
Earnings Per Share [Abstract]
Weighted average common shares, basic	23,890,405	23,717,165	23,883,919	23,714,215
Dilutive effect of stock options	169,917	308,930	170,985	301,732
Weighted average common shares, diluted	24,060,322	24,026,095	24,054,904	24,015,947