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Capital Stock (Tables) | 12 Months Ended
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Dec. 31, 2015
Disclosure Capital Stock Additional Information [Abstract] |
Schedule Of Common Stock Activity | Common stock activity is summarized as follows:
| Shares |  | Dollars
(Dollars in thousands) | Issued |  | Stock Compensation Trust |  | Treasury |  | Common Stock |  | Stock Compensation Trust |  | Treasury Cost
Balances January 1, 2013 | 62,081,391 |  |  | (745,430 | ) |  | (24,328,162 | ) |  | $ | 112,135 |  |  | $ | (3,891 | ) |  | $ | (267,987 | )
Restricted stock awards | — |  |  | 96,686 |  |  | — |  |  | (505 | ) |  | 505 |  |  | — |
Restricted stock expense | — |  |  | — |  |  | — |  |  | 4,244 |  |  | — |  |  | — |
Restricted stock forfeitures | — |  |  | — |  |  | (7,365 | ) |  | (115 | ) |  | — |  |  | — |
Stock options exercised | — |  |  | 277,687 |  |  | — |  |  | 8,194 |  |  | 1,449 |  |  | — |
Stock option expense | — |  |  | — |  |  | — |  |  | 2,825 |  |  | — |  |  | — |
Performance stock issued | — |  |  | 67,389 |  |  | — |  |  | (352 | ) |  | 352 |  |  | — |
Performance stock expense | — |  |  | — |  |  | — |  |  | 3,383 |  |  | — |  |  | — |
Tax benefit related to stock plans | — |  |  | — |  |  | — |  |  | 2,246 |  |  | — |  |  | — |
Treasury shares purchased for stock compensation programs | — |  |  | — |  |  | (240,097 | ) |  | — |  |  | — |  |  | (11,785 | )
Balances December 31, 2013 | 62,081,391 |  |  | (303,668 | ) |  | (24,575,624 | ) |  | 132,055 |  |  | (1,585 | ) |  | (279,772 | )
Restricted stock awards | — |  |  | 72,291 |  |  | 13,936 |  |  | (538 | ) |  | 377 |  |  | 161 |
Restricted stock expense | — |  |  | — |  |  | — |  |  | 4,372 |  |  | — |  |  | — |
Restricted stock forfeitures | — |  |  | — |  |  | (4,078 | ) |  | (346 | ) |  | — |  |  | — |
Stock options exercised | — |  |  | 150,962 |  |  | 39,781 |  |  | 5,678 |  |  | 788 |  |  | 460 |
Stock option expense | — |  |  | — |  |  | — |  |  | 2,355 |  |  | — |  |  | — |
Performance stock issued | — |  |  | 80,415 |  |  | — |  |  | (420 | ) |  | 420 |  |  | — |
Performance stock expense | — |  |  | — |  |  | — |  |  | 2,705 |  |  | — |  |  | — |
Performance stock forfeitures | — |  |  | — |  |  | — |  |  | (33 | ) |  | — |  |  | — |
Tax benefit related to stock plans | — |  |  | — |  |  | — |  |  | 2,573 |  |  | — |  |  | — |
Treasury shares purchased for stock compensation programs | — |  |  | — |  |  | (107,096 | ) |  | — |  |  | — |  |  | (5,654 | )
Balances December 31, 2014 | 62,081,391 |  |  | — |  |  | (24,633,081 | ) |  | 148,401 |  |  | — |  |  | (284,805 | )
Restricted stock awards | — |  |  | — |  |  | 34,624 |  |  | (404 | ) |  | — |  |  | 404 |
Restricted stock expense | — |  |  | — |  |  | — |  |  | 3,461 |  |  | — |  |  | — |
Restricted stock forfeitures | — |  |  | — |  |  | (18,468 | ) |  | (426 | ) |  | — |  |  | — |
Stock options exercised | — |  |  | — |  |  | 52,708 |  |  | 1,714 |  |  | — |  |  | 216 |
Stock option expense | — |  |  | — |  |  |  |  |  | 2,572 |  |  | — |  |  | — |
Stock option forfeitures | — |  |  | — |  |  | — |  |  | (118 | ) |  | — |  |  | — |
Performance stock issued | — |  |  | — |  |  | 52,839 |  |  | (616 | ) |  | — |  |  | 616 |
Performance stock expense | — |  |  | — |  |  | — |  |  | 2,265 |  |  | — |  |  | — |
Performance stock forfeitures | — |  |  | — |  |  | — |  |  | (155 | ) |  | — |  |  | — |
Employee stock purchase plan | — |  |  | — |  |  | 11,517 |  |  | 352 |  |  | — |  |  | 136 |
Tax benefit related to stock plans | — |  |  | — |  |  | — |  |  | 596 |  |  | — |  |  | — |
Treasury shares purchased for stock compensation programs | — |  |  | — |  |  | (59,056 | ) |  | — |  |  | — |  |  | (2,781 | )
Share repurchase program | — |  |  | — |  |  | (150,000 | ) |  | — |  |  | — |  |  | (7,104 | )
Balances December 31, 2015 | 62,081,391 |  |  | — |  |  | (24,708,917 | ) |  | $ | 157,642 |  |  | $ | — |  |  | $ | (293,318 | )

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- Definition Disclosure - Capital Stock - Additional Information [Abstract] + References No definition available. + Details
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- Definition Tabular disclosure of changes in the separate accounts comprising stockholders' equity (in addition to retained earnings) and of the changes in the number of shares of equity securities during at least the most recent annual fiscal period and any subsequent interim period presented is required to make the financial statements sufficiently informative if both financial position and results of operations are presented. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21463-112644 + Details
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