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Stock Compensation (Tables) | 12 Months Ended
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Dec. 31, 2020
Stock Compensation [Abstract] |
Schedule Of Shares Available For Grant |
|  | Authorized |  | Available for Grant
Plan |  | Shares |  | 2020 |  | 2019
1996 Discounted Employee Stock Purchase Plan, as amended |  | 1,900,000 |  | 150,000 |  | 234,000
2009 Equity and Cash Incentive Plan |  | 7,570,000 |  | 52,000 |  | 2,100,000
2020 Equity and Cash Incentive Plan |  | 4,105,000 |  | 4,094,000 |  | --
Total |  | 13,575,000 |  | 4,296,000 |  | 2,334,000
Schedule Of Stock Grant Activity For RSAs |
|  |  |  | Weighted
|  |  |  | Average
|  |  |  | Grant Date
RSAs |  | Shares |  | Fair Value
Unvested at December 31, 2017 |  | 383,000 |  | $ | 12.81
Granted |  | 128,000 |  |  | 23.83
Vested |  | (136,000) |  |  | 12.96
Forfeited |  | (49,000) |  |  | 12.07
Unvested at December 31, 2018 |  | 326,000 |  |  | 17.19
Granted |  | 93,000 |  |  | 29.77
Vested |  | (149,000) |  |  | 14.45
Forfeited |  | (27,000) |  |  | 20.53
Unvested at December 31, 2019 |  | 243,000 |  |  | 23.30
Granted |  | 123,000 |  |  | 24.70
Vested |  | (108,000) |  |  | 20.66
Forfeited |  | -- |  |  | -
Unvested at December 31, 2020 |  | 258,000 |  |  | 25.08
Schedule Of Stock Grant Activity For RSUs |
|  |  |  | Weighted |  |  |
|  |  |  | Average |  |  |
|  |  |  | Remaining |  | Aggregate
|  |  |  | Contractual |  | Intrinsic
RSUs |  | Shares |  | Term in years |  | Value
Unvested at December 31, 2017 |  | 286,000 |  |  | 1.26 |  | $ | 5,477,000
Granted |  | 115,000 |  |  |  |  |  |
Vested |  | (99,000) |  |  |  |  |  |
Forfeited |  | (51,000) |  |  |  |  |  |
Unvested at December 31, 2018 |  | 251,000 |  |  | 1.05 |  |  | 7,123,000
Granted |  | 103,000 |  |  |  |  |  |
Vested |  | (101,000) |  |  |  |  |  |
Forfeited |  | (27,000) |  |  |  |  |  |
Unvested at December 31, 2019 |  | 226,000 |  |  | 0.93 |  |  | 6,131,000
Granted |  | 141,000 |  |  |  |  |  |
Vested |  | (118,000) |  |  |  |  |  |
Forfeited |  | (37,000) |  |  |  |  |  |
Unvested at December 31, 2020 |  | 212,000 |  |  | 1.02 |  |  | 5,015,000
Vested and expected to vest |  | 212,000 |  |  | 1.02 |  | $ | 5,015,000
Schedule Of Stock Grant Activity For PSUs |
|  |  |  | Weighted |  |  |
|  |  |  | Average |  |  |
|  |  |  | Remaining |  | Aggregate
|  |  |  | Contractual |  | Intrinsic
PSUs |  | Shares |  | Term in years |  | Value
Unvested at December 31, 2017 |  | 169,000 |  |  | 0.71 |  | $ | 3,236,000
Granted |  | 104,000 |  |  |  |  |  |
Vested |  | (109,000) |  |  |  |  |  |
Forfeited |  | (17,000) |  |  |  |  |  |
Unvested at December 31, 2018 |  | 147,000 |  |  | 0.72 |  |  | 4,179,000
Granted |  | 322,000 |  |  |  |  |  |
Vested |  | (87,000) |  |  |  |  |  |
Forfeited |  | (35,000) |  |  |  |  |  |
Unvested at December 31, 2019 |  | 347,000 |  |  | 2.33 |  |  | 9,400,000
Granted |  | 70,000 |  |  |  |  |  |
Vested |  | (55,000) |  |  |  |  |  |
Forfeited |  | (31,000) |  |  |  |  |  |
Unvested at December 31, 2020 |  | 331,000 |  |  | 1.64 |  |  | 7,805,000
Vested and expected to vest |  | 331,000 |  |  | 1.64 |  | $ | 7,805,000
Summary Of Stock Option Activity |
|  |  |  |  |  |  | Weighted |  |  |
|  |  |  |  |  |  | Average |  |  |
|  |  |  | Weighted |  | Remaining |  | Aggregate
|  |  |  | Average |  | Contractual |  | Intrinsic
|  | Shares |  | Exercise Price |  | Term in years |  | Value
Outstanding at December 31, 2017 |  | 1,741,000 |  |  | 10.19 |  |  | 3.64 |  |  | 15,598,000
Granted |  | 219,000 |  |  | 21.55 |  |  |  |  |  |
Exercised |  | (578,000) |  |  | 7.59 |  |  |  |  |  |
Forfeited |  | (49,000) |  |  | 14.10 |  |  |  |  |  |
Outstanding at December 31, 2018 |  | 1,333,000 |  |  | 13.04 |  |  | 3.93 |  |  | 20,439,000
Granted |  | 169,000 |  |  | 29.62 |  |  |  |  |  |
Exercised |  | (334,000) |  |  | 9.87 |  |  |  |  |  |
Forfeited |  | (39,000) |  |  | 22.64 |  |  |  |  |  |
Outstanding at December 31, 2019 |  | 1,129,000 |  |  | 16.14 |  |  | 3.67 |  |  | 12,763,000
Granted |  | 212,000 |  |  | 26.24 |  |  |  |  |  |
Exercised |  | (88,000) |  |  | 10.49 |  |  |  |  |  |
Forfeited |  | (12,000) |  |  | 27.36 |  |  |  |  |  |
Outstanding at December 31, 2020 |  | 1,241,000 |  |  | 18.16 |  |  | 3.38 |  |  | 8,215,000
Vested and expected to vest |  | 1,241,000 |  | $ | 18.16 |  |  | 3.38 |  | $ | 8,215,000
Exercisable at December 31, 2020 |  | 874,000 |  | $ | 14.71 |  |  | 2.45 |  | $ | 8,094,000
Summary Of Other Information Concerning Stock Options |
| 2020 |  | 2019 |  | 2018
Weighted-average fair value of options granted | $ | 8.64 |  | $ | 11.47 |  | $ | 8.38
Intrinsic value of options exercised |  | 1,267,000 |  |  | 6,519,000 |  |  | 9,961,000
Schedule Of Weighted-Average Assumptions Used To Determine The Fair Value Of Options |
| 2020 |  | 2019 |  | 2018
| Stock |  | ESPP |  | Stock |  | ESPP |  | Stock |  | ESPP
| Options |  | Options |  | Options |  | Options |  | Options |  | Options
Expected life of options | 5.00 Years |  | 0.50 Years |  | 5.00 Years |  | 0.50 Years |  | 5.00 Years |  | 0.50 Years
Expected stock price volatility | 0.35 |  | 0.52 |  | 0.40 |  | 0.39 |  | 0.40 |  | 0.34
Risk-free interest rate | 1.41% |  | 1.00% |  | 2.54% |  | 2.35% |  | 2.64% |  | 1.73%
Summary Of Total Stock Compensation Expenses |
| 2020 |  | 2019 |  | 2018
RSA, PSA, RSU, and PSU expense | $ | 5,288 |  | $ | 7,451 |  | $ | 5,076
Stock option and ESPP option expense |  | 2,216 |  |  | 1,960 |  |  | 1,732
Total stock compensation expense | $ | 7,504 |  | $ | 9,411 |  | $ | 6,808

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