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Fair Value and Equity Investments, Fair Value (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2024 | Dec. 31, 2023
Fair Value on a Recurring Basis [Member] |  |
Financial Assets (Liabilities) [Abstract] |  |
Cash equivalents and current investments | $ 23,914 | $ 42,916
Derivative financial instruments asset | 4,708 | 12,689
Life insurance contracts | 44,091 | 45,041
Contingent consideration | 0 | (6,300)
Financial assets (liabilities) | 72,713 | 94,346
Restricted current investments | 1,400 | 4,000
Fair Value on a Recurring Basis [Member] | Level 1 [Member] |  |
Financial Assets (Liabilities) [Abstract] |  |
Cash equivalents and current investments | 23,914 | 42,916
Derivative financial instruments asset | 0 | 0
Life insurance contracts | 0 | 0
Contingent consideration | 0 | 0
Financial assets (liabilities) | 23,914 | 42,916
Fair Value on a Recurring Basis [Member] | Level 2 [Member] |  |
Financial Assets (Liabilities) [Abstract] |  |
Cash equivalents and current investments | 0 | 0
Derivative financial instruments asset | 4,708 | 12,689
Life insurance contracts | 0 | 0
Contingent consideration | 0 | 0
Financial assets (liabilities) | 4,708 | 12,689
Fair Value on a Recurring Basis [Member] | Level 3 [Member] |  |
Financial Assets (Liabilities) [Abstract] |  |
Cash equivalents and current investments | 0 | 0
Derivative financial instruments asset | 0 | 0
Life insurance contracts | 44,091 | 45,041
Contingent consideration | 0 | (6,300)
Financial assets (liabilities) | 44,091 | 38,741
Contingent Consideration [Member] |  |
Changes in Fair Value of Level 3 Contingent Consideration [Roll Forward] |  |
Beginning balance | (6,300) | (6,364)
Changes in fair value of contingent consideration | 0 | 64
Payments | 6,300 | 0
Ending balance | 0 | (6,300)
Life Insurance Contracts [Member] |  |
Changes in Fair Value of Level 3 Marketable Securities [Roll Forward] |  |
Beginning balance | 45,041 | 40,055
Actual return on plan assets | 6,250 | 6,216
Sales and settlements | (7,200) | (1,230)
Ending balance | $ 44,091 | $ 45,041

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