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Stock-Based Compensation Plans (Schedule Of Stock Option Activity) (Details) - Stock Options [Member]
shares in Thousands
12 Months Ended
Dec. 31, 2017
$ / shares
shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Outstanding at beginning of period, Number of Shares | shares 2,260
Granted, Number of Shares | shares
Exercised, Number of Shares | shares
Forfeited and expired, Number of Shares | shares (440)
Outstanding at end of period, Number of Shares | shares 1,820
Outstanding at beginning of period, Weighted Average Exercise | $ / shares $ 13.92
Granted, Weighted Average Exercise | $ / shares
Exercised, Weighted Average Exercise | $ / shares
Forfeited and expired, Weighted Average Exercise | $ / shares 13.26
Outstanding at end of period, Weighted Average Exercise | $ / shares $ 14.08
Outstanding at end of period, Weighted Average Remaining Term (in years) 8 years 6 months