Earnings Per Share (Schedule Of Calculation Of Numerator And Denominator In Earnings Per Share) (Details) - shares shares in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Earnings Per Share [Abstract]
Weighted average shares outstanding used to compute basic earnings per share	33,074	32,961	33,028	32,941
Incremental dilutive shares attributable to stock options and restricted stock	34	90	20	58
Shares used to compute diluted earnings per share	33,108	33,051	33,048	32,999