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Investments (Tables) | 9 Months Ended
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Sep. 30, 2020
Investments, Debt and Equity Securities [Abstract] |
Investments schedule [Table Text Block] | The investment balances at September 30, 2020 and December 31, 2019, consisted of the following:
(in thousands) | September 30, 2020 |  | December 31, 2019
Rabbi trust (associated with the Non-Qualified Deferred Compensation Plan) | $ | 9,663 |  |  | $ | 9,202 |
Investments in equity securities | 17 |  |  | 27 |
Total | $ | 9,680 |  |  | $ | 9,229 |

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