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Stock Compensation (Tables) | 12 Months Ended
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Dec. 31, 2018
Stock Compensation [Abstract] |
Schedule Of Shares Available For Grant |
﻿ |  |  |  |  |  |
﻿ |  |  |  |  |  |
﻿ |  | Authorized |  | Available for Grant
﻿Plan |  | Shares |  | 2018 |  | 2017
﻿1996 Discounted Employee Stock Purchase Plan, as amended |  | 1,900,000 |  | 295,000 |  | 377,000
﻿2009 Equity and Cash Incentive Plan |  | 7,100,000 |  | 958,000 |  | 1,422,000
﻿Total |  | 9,000,000 |  | 1,253,000 |  | 1,799,000
﻿
Schedule Of Stock Grant Activity For RSAs |
﻿ |  |  |  |  |
﻿ |  |  |  | Weighted
﻿ |  |  |  | Average
﻿ |  |  |  | Grant Date
﻿RSAs |  | Shares |  | Fair Value
﻿Unvested at December 31, 2015 |  | 314,000 |  | $ | 9.31
﻿Granted |  | 216,000 |  |  | 10.84
﻿Vested |  | (138,000) |  |  | 7.92
﻿Forfeited |  | -- |  |  | --
﻿Unvested at December 31, 2016 |  | 392,000 |  |  | 10.64
﻿Granted |  | 138,000 |  |  | 17.00
﻿Vested |  | (129,000) |  |  | 10.84
﻿Forfeited |  | (18,000) |  |  | 11.78
﻿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
﻿
Schedule Of Stock Grant Activity For PSAs |
﻿ |  |  |  |  |
﻿ |  |  |  | Weighted
﻿ |  |  |  | Average
﻿ |  |  |  | Grant Date
﻿PSAs |  | Shares |  | Fair Value
﻿Unvested at December 31, 2015 |  | 250,000 |  | $ | 10.18
﻿Granted |  | -- |  |  | --
﻿Vested |  | -- |  |  | --
﻿Forfeited |  | -- |  |  | --
﻿Unvested at December 31, 2016 |  | 250,000 |  |  | 10.18
﻿Granted |  | -- |  |  | --
﻿Vested |  | (250,000) |  |  | 10.18
﻿Forfeited |  | -- |  |  | --
﻿Unvested at December 31, 2017 |  | -- |  |  | --
﻿Granted |  | -- |  |  | --
﻿Vested |  | -- |  |  | --
﻿Forfeited |  | -- |  |  | --
﻿Unvested at December 31, 2018 |  | - |  |  | --
﻿
Schedule Of Stock Grant Activity For RSUs |
﻿ |  |  |  |  |  |  |  |
﻿ |  |  |  | Weighted |  |  |
﻿ |  |  |  | Average |  |  |
﻿ |  |  |  | Remaining |  | Aggregate
﻿ |  |  |  | Contractual |  | Intrinsic
﻿RSUs |  | Shares |  | Term in years |  | Value
﻿Unvested at December 31, 2015 |  | 103,000 |  |  | 1.17 |  | $ | 1,110,000
﻿Granted |  | 146,000 |  |  |  |  |  |
﻿Vested |  | (44,000) |  |  |  |  |  |
﻿Forfeited |  | (27,000) |  |  |  |  |  |
﻿Unvested at December 31, 2016 |  | 178,000 |  |  | 1.24 |  |  | 3,405,000
﻿Granted |  | 196,000 |  |  |  |  |  |
﻿Vested |  | (64,000) |  |  |  |  |  |
﻿Forfeited |  | (24,000) |  |  |  |  |  |
﻿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
﻿ |  |  |  |  |  |  |  |
﻿Vested and expected to vest |  | 251,000 |  |  | 1.05 |  | $ | 7,123,000
﻿
Schedule Of Stock Grant Activity For PSUs |
﻿ |  |  |  |  |  |  |  |
﻿ |  |  |  | Weighted |  |  |
﻿ |  |  |  | Average |  |  |
﻿ |  |  |  | Remaining |  | Aggregate
﻿ |  |  |  | Contractual |  | Intrinsic
﻿PSUs |  | Shares |  | Term in years |  | Value
﻿Unvested at December 31, 2015 |  | 135,000 |  |  | 0.74 |  | $ | 1,455,000
﻿Granted |  | 144,000 |  |  |  |  |  |
﻿Vested |  | (83,000) |  |  |  |  |  |
﻿Forfeited |  | (8,000) |  |  |  |  |  |
﻿Unvested at December 31, 2016 |  | 188,000 |  |  | 0.77 |  |  | 3,603,000
﻿Granted |  | 126,000 |  |  |  |  |  |
﻿Vested |  | (128,000) |  |  |  |  |  |
﻿Forfeited |  | (17,000) |  |  |  |  |  |
﻿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
﻿ |  |  |  |  |  |  |  |
﻿Vested and expected to vest |  | 147,000 |  |  | 0.72 |  | $ | 4,179,000
﻿
Summary Of Stock Option Activity |
﻿ |  |  |  |  |  |  |  |  |  |  |
﻿ |  |  |  |  |  |  |  |  |  |  |
﻿ |  |  |  |  |  |  | Weighted |  |  |
﻿ |  |  |  |  |  |  | Average |  |  |
﻿ |  |  |  | Weighted |  | Remaining |  | Aggregate
﻿ |  |  |  | Average |  | Contractual |  | Intrinsic
﻿ |  | Shares |  | Exercise Price |  | Term in years |  | Value
﻿Outstanding at December 31, 2015 |  | 1,896,000 |  | $ | 7.65 |  |  | 3.31 |  | $ | 5,992,000
﻿Granted |  | 387,000 |  |  | 10.34 |  |  |  |  |  |
﻿Exercised |  | (372,000) |  |  | 5.60 |  |  |  |  |  |
﻿Forfeited |  | -- |  |  | -- |  |  |  |  |  |
﻿Expired |  | -- |  |  | -- |  |  |  |  |  |
﻿Outstanding at December 31, 2016 |  | 1,911,000 |  |  | 8.59 |  |  | 3.55 |  |  | 20,179,000
﻿Granted |  | 260,000 |  |  | 16.30 |  |  |  |  |  |
﻿Exercised |  | (394,000) |  |  | 6.30 |  |  |  |  |  |
﻿Forfeited |  | (31,000) |  |  | 12.47 |  |  |  |  |  |
﻿Expired |  | (5,000) |  |  | 7.01 |  |  |  |  |  |
﻿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 |  |  |  |  |  |
﻿Expired |  | -- |  |  | -- |  |  |  |  |  |
﻿Outstanding at December 31, 2018 |  | 1,333,000 |  |  | 13.04 |  |  | 3.93 |  |  | 20,439,000
﻿ |  |  |  |  |  |  |  |  |  |  |
﻿Vested and expected to vest |  | 1,333,000 |  | $ | 13.04 |  |  | 3.93 |  | $ | 20,439,000
﻿Exercisable at December 31, 2018 |  | 872,000 |  | $ | 10.74 |  |  | 3.15 |  | $ | 15,381,000
﻿
Summary Of Other Information Concerning Stock Options |
﻿ |  |  |  |  |  |  |  |
﻿ |  |  |  |  |  |  |  |
﻿ | 2018 |  | 2017 |  | 2016
﻿Weighted-average fair value of options granted | $ | 8.38 |  | $ | 5.97 |  | $ | 3.68
﻿Intrinsic value of options exercised |  | 9,961,000 |  |  | 4,748,000 |  |  | 2,422,000
﻿
Schedule Of Weighted-Average Assumptions Used To Determine The Fair Value Of Options |
﻿ |  |  |  |  |  |  |  |  |  |  |
﻿ |  |  |  |  |  |  |  |  |  |  |
﻿ | 2018 |  | 2017 |  | 2016
﻿ | Stock |  | ESPP |  | Stock |  | ESPP |  | Stock |  | ESPP
﻿ | Options |  | Options |  | Options |  | Options |  | Options |  | Options
﻿Expected life of options | 5.00 Years |  | 0.50 Years |  | 4.75 Years |  | 0.50 Years |  | 4.75 Years |  | 0.50 Years
﻿Expected stock price volatility | 0.40 |  | 0.34 |  | 0.40 |  | 0.39 |  | 0.40 |  | 0.30
﻿Risk-free interest rate | 2.64% |  | 1.73% |  | 1.87% |  | 0.85% |  | 1.20% |  | 0.43%
﻿
Summary Of Total Stock Compensation Expenses |
﻿ |  |  |  |  |  |  |  |
﻿ |  |  |  |  |  |  |  |
﻿ | 2018 |  | 2017 |  | 2016
﻿RSA, PSA, RSU, and PSU expense | $ | 5,076 |  | $ | 5,335 |  | $ | 4,966
﻿Stock option and ESPP option expense |  | 1,732 |  |  | 1,978 |  |  | 1,636
﻿Total stock compensation expense | $ | 6,808 |  | $ | 7,313 |  | $ | 6,602
﻿

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