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Fair Value Measurement (Financial Instruments Not Measured at Fair Value) (Details) - USD ($) $ in Thousands | Mar. 31, 2024 | Dec. 31, 2023
--- | --- | ---
Carrying Value |  |
Financial assets: |  |
Other assets | $ 34,824 | $ 33,231
Financial liabilities: |  |
Other liabilities | 33,548 | 32,043
Carrying Value | Revolving Credit Facility |  |
Financial liabilities: |  |
Senior notes due 2023 | 125,000 | 125,000
Carrying Value | Term Loan |  |
Financial liabilities: |  |
Senior notes due 2023 | 125,000 | 125,000
Carrying Value | Contribution Certificates |  |
Financial liabilities: |  |
Contribution Certificates | 179,865 | 179,387
Carrying Value | BOLI |  |
Financial assets: |  |
Short-term and other investments | 78,657 | 78,205
Carrying Value | Other investments |  |
Financial assets: |  |
Short-term and other investments | 4,064 | 3,215
Fair Value |  |
Financial assets: |  |
Other assets | 34,824 | 33,221
Financial liabilities: |  |
Other liabilities | 33,548 | 32,043
Fair Value | Revolving Credit Facility |  |
Financial liabilities: |  |
Senior notes due 2023 | 125,000 | 125,000
Fair Value | Term Loan |  |
Financial liabilities: |  |
Senior notes due 2023 | 125,000 | 125,000
Fair Value | Contribution Certificates |  |
Financial liabilities: |  |
Contribution Certificates | 147,328 | 149,782
Fair Value | BOLI |  |
Financial assets: |  |
Short-term and other investments | 78,657 | 78,205
Fair Value | Other investments |  |
Financial assets: |  |
Short-term and other investments | $ 4,064 | $ 3,215

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