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Equity Compensation and Other Benefit Plans (Details 2) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended |
--- | --- | --- | ---
Sep. 30, 2021 | Sep. 30, 2020 | Sep. 30, 2021 | Sep. 30, 2020 | Dec. 31, 2020
Deferred Compensation Plans |  |  |  |  |
Deferred Compensation Activity |  |  |  |  |
Deferrable compensation by the employee, maximum |  |  | 100.00% |  |
Non-employee directors | $ 43 | $ 75 | $ 488 | $ (1,483) |
Undistributed Income Deferred | 2,564 |  | 2,564 |  | $ 2,197
Liability Under Deferred Plans | 2,664 |  | 2,664 |  | 1,809
Deferred Compensation Plans | Non-employee directors |  |  |  |  |
Deferred Compensation Activity |  |  |  |  |
Non-employee directors | 43 | 75 | 488 | (1,483) |
Undistributed Income Deferred | 2,564 |  | 2,564 |  | 2,197
Liability Under Deferred Plans | 2,664 |  | $ 2,664 |  | $ 1,809
Savings Plan |  |  |  |  |
Deferred Compensation Activity |  |  |  |  |
Employer contribution percentage on first 3 percent of eligible compensation deferred by employees (percent) |  |  | 100.00% |  |
Percentage of eligible compensation deferred by employees qualifying for 100 percent matching contribution (percent) |  |  | 3.00% |  |
Employer contribution percentage on next 2 percent of eligible compensation deferred by employees (percent) |  |  | 50.00% |  |
Percentage of eligible compensation deferred by employees qualifying for 50 percent matching contribution (percent) |  |  | 2.00% |  |
Percentage of employer matching contributions that vest immediately (percent) |  |  | 100.00% |  |
Expenses for matching contributions | $ 219 | $ 120 | $ 469 | $ 360 |

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