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Stock Option And Stock Award Plans (Tables) | 12 Months Ended
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Dec. 31, 2017
Disclosure of Compensation Related Costs, Share-based Payments [Abstract] |
Summary Of Stock Options Outstanding | A summary of stock options outstanding at December 31, 2017, 2016 and 2015, and changes during those years, is presented below:
|  |  | Option Exercise Price/Share
| Number of Options |  | Range |  | Weighted Average
Outstanding at January 1, 2015 | 1,164,120 |  |  | $ | 14.06 |  |  | to |  | $ | 30.01 |  |  | $ | 19.59 |
Granted | — |  |  | — |  |  | to |  | — |  |  | — |
Forfeited and expired | (60,207 | ) |  | 17.13 |  |  | to |  | 30.01 |  |  | 22.30 |
Exercised | (222,400 | ) |  | 14.06 |  |  | to |  | 19.84 |  |  | 16.34 |
Outstanding at December 31, 2015 | 881,513 |  |  | 17.13 |  |  | to |  | 30.01 |  |  | 20.22 |
Granted | — |  |  | — |  |  | to |  | — |  |  | — |
Forfeited and expired | (246,394 | ) |  | 17.13 |  |  | to |  | 30.01 |  |  | 18.90 |
Exercised | (134,200 | ) |  | 17.13 |  |  | to |  | 19.84 |  |  | 17.23 |
Outstanding at December 31, 2016 | 500,919 |  |  | 17.13 |  |  | to |  | 30.01 |  |  | 21.67 |
Granted | 209,551 |  |  | 15.65 |  |  | to |  | 15.65 |  |  | 15.65 |
Forfeited and expired | (60,685 | ) |  | 17.13 |  |  | to |  | 30.01 |  |  | 21.42 |
Exercised | (41,265 | ) |  | 19.84 |  |  | to |  | 19.84 |  |  | 19.84 |
Outstanding at December 31, 2017 | 608,520 |  |  | $ | 15.65 |  |  | to |  | $ | 24.84 |  |  | $ | 19.75 |
Summary Of Additional Information On Stock Options Outstanding And Exercisable | The following table summarizes additional information about stock options outstanding and exercisable at December 31, 2017:
|  |  |  |  |  | Options Outstanding at December 31, 2017 |  | Options Exercisable at December 31, 2017
|  |  |  |  |  |  |  | Weighted Average |  | Aggregate Intrinsic Value (In thousands) |  |  |  |  |  | Aggregate Intrinsic Value (In thousands)
Range of Exercise Prices |  | Shares |  | Remaining Contractual Life (Years) |  | Exercise Price |  |  | Shares |  | Weighted Average Exercise Price |
$ | — |  |  | to |  | $ | 15.00 |  |  | — |  |  | 0.0 |  | $ | — |  |  | $ | — |  |  | — |  |  | $ | — |  |  | $ | — |
15.01 |  |  | to |  | 17.50 |  |  | 209,551 |  |  | 6.4 |  | 15.65 |  |  | 743,906 |  |  | — |  |  | — |  |  | — |
17.51 |  |  | to |  | 20.00 |  |  | 171,460 |  |  | 2.2 |  | 19.58 |  |  | 429 |  |  | 171,460 |  |  | 19.58 |  |  | 429 |
20.01 |  |  | to |  | 25.00 |  |  | 227,509 |  |  | 5.6 |  | 23.64 |  |  | — |  |  | 214,198 |  |  | 23.71 |  |  | — |
Total |  | 608,520 |  |  | 4.9 |  | $ | 19.75 |  |  | $ | 744,335 |  |  | 385,658 |  |  | $ | 21.88 |  |  | $ | 429 |
Summary Of Additional Information On Non-Vested Restricted Stock Outstanding | The following table summarizes additional information about unvested restricted stock outstanding at December 31, 2017, 2016 and 2015:
| Unvested Restricted Stock |  | Maximum Unvested Restricted Stock Units Issuable Upon Satisfaction of Certain Performance Criteria
| Number of Shares |  | Weighted Avg. Grant Date Fair Value/Share |  | Grant Date Fair Value (In thousands) |  | Number of Shares |  | Weighted Avg. Grant Date Fair Value/Share |  | Grant Date Fair Value (In thousands)
Outstanding at January 1, 2015 | 188,058 |  |  | $ | 22.48 |  |  | $ | 4,227 |  |  | 129,713 |  |  | $ | 24.99 |  |  | $ | 3,241 |
Granted | 147,666 |  |  | 18.87 |  |  | 2,786 |  |  | 144,582 |  |  | 18.47 |  |  | 2,670 |
Vested | (174,145 | ) |  | 20.57 |  |  | (3,582 | ) |  | — |  |  | — |  |  | — |
Forfeited | (29,226 | ) |  | 21.42 |  |  | (626 | ) |  | (107,167 | ) |  | 20.78 |  |  | (2,227 | )
Outstanding at December 31, 2015 | 132,353 |  |  | 21.19 |  |  | 2,805 |  |  | 167,128 |  |  | 22.04 |  |  | 3,684 |
Granted | 144,546 |  |  | 13.47 |  |  | 1,947 |  |  | 136,986 |  |  | 11.34 |  |  | 1,553 |
Vested | (52,167 | ) |  | 21.56 |  |  | (1,125 | ) |  | — |  |  | — |  |  | — |
Forfeited | (17,377 | ) |  | 18.97 |  |  | (330 | ) |  | (65,685 | ) |  | 20.24 |  |  | (1,329 | )
Outstanding at December 31, 2016 | 207,355 |  |  | 15.90 |  |  | 3,297 |  |  | 238,429 |  |  | 16.39 |  |  | 3,908 |
Granted | 107,362 |  |  | 18.29 |  |  | 1,964 |  |  | 46,205 |  |  | 17.38 |  |  | 803 |
Vested | (50,154 | ) |  | 19.72 |  |  | (989 | ) |  | — |  |  | — |  |  | — |
Forfeited | (57,887 | ) |  | 16.16 |  |  | (935 | ) |  | (112,501 | ) |  | 17.73 |  |  | (1,995 | )
Outstanding at December 31, 2017 | 206,676 |  |  | $ | 16.15 |  |  | $ | 3,337 |  |  | 172,133 |  |  | $ | 15.78 |  |  | $ | 2,716 |

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- Definition Tabular disclosure of option exercise prices, by grouped ranges, including the upper and lower limits of the price range, the number of shares under option, weighted average exercise price and remaining contractual option terms. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901 + Details
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- Definition Tabular disclosure for stock option plans. Includes, but is not limited to, outstanding awards at beginning and end of year, grants, exercises, forfeitures, and weighted-average grant date fair value. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901 + Details
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