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Employee Benefit Plans 12 (Details) - SERP - USD ($) $ in Thousands | Dec. 31, 2020 | Dec. 31, 2019
--- | --- | ---
Balance in Rabbi Trust |  |
Balance in Rabbi Trust | $ 25,900 |
Fair value of assets held in Rabbi Trust | 0 | $ 0
Rabbi Trust | Fair Value |  |
Balance in Rabbi Trust |  |
Fair value of assets held in Rabbi Trust | 25,912 | 21,553
Level 1 | Rabbi Trust |  |
Balance in Rabbi Trust |  |
Fair value of assets held in Rabbi Trust | 25,912 | 21,553
Level 2 | Rabbi Trust |  |
Balance in Rabbi Trust |  |
Fair value of assets held in Rabbi Trust | 0 | 0
Level 3 | Rabbi Trust |  |
Balance in Rabbi Trust |  |
Fair value of assets held in Rabbi Trust | 0 | 0
Cash equivalents | Rabbi Trust | Fair Value |  |
Balance in Rabbi Trust |  |
Fair value of assets held in Rabbi Trust | 8 | 72
Cash equivalents | Level 1 | Rabbi Trust |  |
Balance in Rabbi Trust |  |
Fair value of assets held in Rabbi Trust | 8 | 72
Cash equivalents | Level 2 | Rabbi Trust |  |
Balance in Rabbi Trust |  |
Fair value of assets held in Rabbi Trust | 0 | 0
Cash equivalents | Level 3 | Rabbi Trust |  |
Balance in Rabbi Trust |  |
Fair value of assets held in Rabbi Trust | 0 | 0
Fixed income fund | Rabbi Trust | Fair Value |  |
Balance in Rabbi Trust |  |
Fair value of assets held in Rabbi Trust | 10,201 | 8,427
Fixed income fund | Level 1 | Rabbi Trust |  |
Balance in Rabbi Trust |  |
Fair value of assets held in Rabbi Trust | 10,201 | 8,427
Fixed income fund | Level 2 | Rabbi Trust |  |
Balance in Rabbi Trust |  |
Fair value of assets held in Rabbi Trust | 0 | 0
Fixed income fund | Level 3 | Rabbi Trust |  |
Balance in Rabbi Trust |  |
Fair value of assets held in Rabbi Trust | 0 | 0
Equity securities | Rabbi Trust | Fair Value |  |
Balance in Rabbi Trust |  |
Fair value of assets held in Rabbi Trust | 15,703 | 13,054
Equity securities | Level 1 | Rabbi Trust |  |
Balance in Rabbi Trust |  |
Fair value of assets held in Rabbi Trust | 15,703 | 13,054
Equity securities | Level 2 | Rabbi Trust |  |
Balance in Rabbi Trust |  |
Fair value of assets held in Rabbi Trust | 0 | 0
Equity securities | Level 3 | Rabbi Trust |  |
Balance in Rabbi Trust |  |
Fair value of assets held in Rabbi Trust | $ 0 | $ 0

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