Shareholders' Equity (Schedule Of Stock Repurchase Activity) (Details) - USD ($)	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
10/12/2017 - 100,000 shares [Member]
Equity, Class of Treasury Stock [Line Items]
Plan Date	Oct. 12, 2017
Expiration	Sep. 30, 2018
Stock repurchase program, authorized amount	$ 100,000
Shares Repurchased	2,605
12/20/2018 - 100,000 shares [Member]
Equity, Class of Treasury Stock [Line Items]
Plan Date	Dec. 20, 2018
Expiration	Dec. 21, 2019
Shares Authorized	100,000
Shares Repurchased