Significant Accounting Policies (Schedule Of Weighted Average Shares Outstanding) (Details) - shares	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Significant Accounting Policies [Abstract]
Weighted average common shares, basic	30,274,000	29,809,000	29,593,000
Dilutive effect of stock options		1,671,000	1,795,000
Weighted average common shares, diluted	30,274,000	31,480,000	31,388,000