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Stock Option And Stock Award Plans (Tables) | 12 Months Ended
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Dec. 31, 2019
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
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, 2019:
|  |  |  |  |  | Options Outstanding at December 31, 2019 |  | Options Exercisable at December 31, 2019
|  |  |  |  |  |  |  | Weighted Average |  | Aggregate Intrinsic Value |  |  |  |  |  | Aggregate Intrinsic Value
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 |  |  | 163,641 |  |  | 4.4 |  | 15.65 |  |  | 1,096,395 |  |  | 104,326 |  |  | 15.65 |  |  | 698,984 |
17.51 |  |  | to |  | 20.00 |  |  | 1,255,670 |  |  | 5.3 |  | 18.83 |  |  | 4,424,405 |  |  | 46,300 |  |  | 19.40 |  |  | 136,585 |
20.01 |  |  | to |  | 25.00 |  |  | 209,592 |  |  | 3.5 |  | 23.69 |  |  | — |  |  | 209,592 |  |  | 23.69 |  |  | — |
Total |  | 1,628,903 |  |  | 5.0 |  | $ | 19.13 |  |  | $ | 5,520,800 |  |  | 360,218 |  |  | $ | 20.81 |  |  | $ | 835,569 |
Summary Of Additional Information On Non-Vested Restricted Stock Outstanding | The following table summarizes additional information about unvested restricted stock outstanding at December 31, 2019, 2018 and 2017:
| 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, 2017 | 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 |
Granted | 119,915 |  |  | 17.39 |  |  | 2,085 |  |  | 61,227 |  |  | 17.35 |  |  | 1,062 |
Vested | (64,702 | ) |  | 18.31 |  |  | (1,185 | ) |  | — |  |  | — |  |  | — |
Forfeited | (17,153 | ) |  | 15.84 |  |  | (272 | ) |  | (48,651 | ) |  | 13.23 |  |  | (644 | )
Outstanding at December 31, 2018 | 244,736 |  |  | 16.20 |  |  | 3,965 |  |  | 184,709 |  |  | 16.97 |  |  | 3,134 |
Granted | 185,422 |  |  | 18.46 |  |  | 3,423 |  |  | 57,442 |  |  | 18.34 |  |  | 1,053 |
Vested | (117,834 | ) |  | 14.76 |  |  | (1,739 | ) |  | (69,926 | ) |  | 10.96 |  |  | (766 | )
Forfeited | (26,389 | ) |  | 16.11 |  |  | (425 | ) |  | (24,562 | ) |  | 11.51 |  |  | (283 | )
Outstanding at December 31, 2019 | 285,935 |  |  | $ | 18.27 |  |  | $ | 5,224 |  |  | 147,663 |  |  | $ | 21.25 |  |  | $ | 3,138 |

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- Definition Tabular disclosure of the changes in outstanding nonvested restricted stock units. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(2) -URI http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901 + Details
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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://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901 + Details
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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