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Equity Incentive Plans (Summary of Stock Option Activity) (Details) - $ / shares | 3 Months Ended | 9 Months Ended | 12 Months Ended
--- | --- | --- | ---
Sep. 30, 2021 | Sep. 30, 2021 | Sep. 30, 2020 | Dec. 31, 2020 | Dec. 31, 2019
Equity Incentive Plans [Abstract] |  |  |  |  |
Outstanding, Beginning Balance - Number of Options |  | 1,192,348 | 1,200,975 | 1,200,975 |
Options Granted - Number of Options |  | 72,800 |  |  |
Options Exercised - Number of Options | (31,000) | (67,623) | (500) |  |
Options Forfeited - Number of Options |  |  | (8,127) |  |
Options Expired - Number of Options |  |  |  |  |
Outstanding, Ending Balance - Number of Options | 1,197,525 | 1,197,525 | 1,192,348 | 1,192,348 | 1,200,975
Outstanding, Range of Exercise Price, Lower Range Limit (per share) |  | $ 9.03 | $ 8.93 | $ 8.93 | $ 8.93
Outstanding, Range of Exercise Price, Upper Range Limit (per share) |  | 13.68 | 13.32 | 13.32 | 13.32
Options Shares Forfeited - Range of Exercise Prices, Lower Range Limit |  |  | 11.26 |  |
Options Shares Forfeited - Range of Exercise Prices, Upper Range Limit |  |  | 12.46 |  |
Options Exercised - Exercise Price |  |  | 10.55 |  |
Options Shares Granted, Range of Exercise Prices, Lower Range Limit |  | 12.89 |  |  |
Options Shares Granted, Range of Exercise Prices, Upper Range Limit |  | 13.68 |  |  |
Option Shares Exercised - Range of Exercise Prices, Lower Range Limit |  | 8.93 |  |  |
Option Shares Exercised - Range of Exercise Prices, Upper Range Limit |  | 12.46 |  |  |
Outstanding Number of Options, Beginning Balance - Weighted Average Exercise Price |  | 11.45 | 11.45 | 11.45 |
Number of Options Granted - Weighted Average Exercise Price |  | 12.96 |  |  |
Number of Options, Exercised - Weighted Average Exercise Price |  | 9.83 | 10.55 |  |
Number of Options Forfeited - Weighted Average Exercise Price |  |  | 11.68 |  |
Outstanding Number of Options, Ending Balance - Weighted Average Exercise Price | $ 11.64 | $ 11.64 | $ 11.45 | $ 11.45 | $ 11.45

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