Stock Compensation and Share Repurchase Plan (Summary Of Outstanding Stock Options Issued Under All Plans) (Details) - $ / shares shares in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Options outstanding (in shares)	98	219	472	807
Weighted avg remaining contractual life	2 years 6 months 15 days
Options outstanding, weighted-avg exercise price (in usd per share)	$ 11.99	$ 15.74	$ 14.58	$ 16.80
Options exercisable (in shares)	98	211	437
Options exercisable, weighted avg exercise price (in usd per share)	$ 11.99	$ 15.88	$ 14.78
$10.49 to $11.59
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Options outstanding, range of exercise prices, minimum (in usd per share)	10.49
Options outstanding, range of exercise prices, maximum (in usd per share)	$ 11.59
Options outstanding (in shares)	21
Weighted avg remaining contractual life	1 year 8 months 9 days
Options outstanding, weighted-avg exercise price (in usd per share)	$ 11.22
Options exercisable (in shares)	21
Options exercisable, weighted avg exercise price (in usd per share)	$ 11.22
$11.89
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Options outstanding, range of exercise prices, minimum (in usd per share)	11.89
Options outstanding, range of exercise prices, maximum (in usd per share)	$ 11.89
Options outstanding (in shares)	40
Weighted avg remaining contractual life	2 years 1 month 2 days
Options outstanding, weighted-avg exercise price (in usd per share)	$ 11.89
Options exercisable (in shares)	40
Options exercisable, weighted avg exercise price (in usd per share)	$ 11.89
$11.98 to $12.87
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Options outstanding, range of exercise prices, minimum (in usd per share)	11.98
Options outstanding, range of exercise prices, maximum (in usd per share)	$ 12.87
Options outstanding (in shares)	37
Weighted avg remaining contractual life	3 years 5 months 27 days
Options outstanding, weighted-avg exercise price (in usd per share)	$ 12.51
Options exercisable (in shares)	37
Options exercisable, weighted avg exercise price (in usd per share)	$ 12.51