Stockholders' Equity (Schedule Of Computation Of Basic And Diluted Earnings Per Share) (Details) - shares shares in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Stockholders' Equity Note [Abstract]
Weighted average shares outstanding for basic earnings per share (in shares)	25,150	25,024	25,108	24,963
Common stock equivalents pertaining to stock options and deferred stock units (in shares)	69	67	69	42
Weighted average shares outstanding for diluted earnings per share (in shares)	25,219	25,091	25,177	25,005
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount	110	122	109	122