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Employee Benefit Plans (Schedule of Fair Value of Pension Plan Assets) (Details) - Pension Benefit Plan [Member] - USD ($) $ in Thousands | Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
--- | --- | --- | ---
Fair value of plan assets | $ 80,380 | $ 66,771 | $ 69,215
Fair Value, Level 1 [Member] |  |  |
Fair value of plan assets | 80,380 | 66,771 |
Fair Value, Level 2 [Member] |  |  |
Fair value of plan assets |  |  |
Fair Value, Level 3 [Member] |  |  |
Fair value of plan assets |  |  |
Equity Securities [Member] |  |  |
Fair value of plan assets | 10,418 | 8,683 |
Equity Securities [Member] | Fair Value, Level 3 [Member] |  |  |
Fair value of plan assets |  |  |
Mutual Funds [Member] |  |  |
Fair value of plan assets | 69,565 | 57,014 |
Mutual Funds [Member] | Fair Value, Level 1 [Member] |  |  |
Fair value of plan assets | 69,565 | 57,014 |
Mutual Funds [Member] | Fair Value, Level 2 [Member] |  |  |
Fair value of plan assets |  |  |
Mutual Funds [Member] | Fair Value, Level 3 [Member] |  |  |
Fair value of plan assets |  |  |
Money Market Funds [Member] |  |  |
Fair value of plan assets | 397 | 1,074 |
Money Market Funds [Member] | Fair Value, Level 1 [Member] |  |  |
Fair value of plan assets | 397 | 1,074 |
Money Market Funds [Member] | Fair Value, Level 2 [Member] |  |  |
Fair value of plan assets |  |  |
Money Market Funds [Member] | Fair Value, Level 3 [Member] |  |  |
Fair value of plan assets |  |  |
Equity Securities [Member] | Fair Value, Level 1 [Member] |  |  |
Fair value of plan assets | 10,418 | 8,683 |
Equity Securities [Member] | Fair Value, Level 2 [Member] |  |  |
Fair value of plan assets |  |  |

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