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Fair Value and Equity Investments, Fair Value (Details) - USD ($) $ in Thousands | 6 Months Ended |
--- | --- | ---
Jun. 30, 2022 | Jun. 30, 2021 | Dec. 31, 2021
Fair Value and Equity Investments [Abstract] |  |  |
Term of variable rate | 30 days |  |
Contingent Consideration [Member] |  |  |
Changes in Fair Value of Level 3 Contingent Consideration [Roll Forward] |  |  |
Beginning balance | $ (10,341) | $ (3,125) |
Additions from acquisitions | 0 | (8,702) |
Changes in fair value of contingent consideration | 1,750 | (203) |
Ending balance | (8,591) | (12,030) |
Fair Value on a Recurring Basis [Member] |  |  |
Financial Assets (Liabilities) [Abstract] |  |  |
Cash equivalents and current investments | 111,099 |  | $ 66,477
Derivative financial instruments asset | 16,376 |  | 6,590
Life insurance contracts | 40,201 |  | 49,851
Contingent consideration | (8,591) |  | (10,341)
Financial assets (liabilities) | 159,085 |  | 112,577
Fair Value on a Recurring Basis [Member] | Level 1 [Member] |  |  |
Financial Assets (Liabilities) [Abstract] |  |  |
Cash equivalents and current investments | 111,099 |  | 66,477
Derivative financial instruments asset | 0 |  | 0
Life insurance contracts | 0 |  | 0
Contingent consideration | 0 |  | 0
Financial assets (liabilities) | 111,099 |  | 66,477
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 | 16,376 |  | 6,590
Life insurance contracts | 0 |  | 0
Contingent consideration | 0 |  | 0
Financial assets (liabilities) | 16,376 |  | 6,590
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 | 40,201 |  | 49,851
Contingent consideration | (8,591) |  | (10,341)
Financial assets (liabilities) | 31,610 |  | $ 39,510
Life Insurance Contracts [Member] |  |  |
Changes in Fair Value of Level 3 Marketable Securities [Roll Forward] |  |  |
Beginning balance | 49,851 | 45,453 |
Actual return on plan assets | (9,650) | 3,608 |
Purchase and issuances | 0 | 7,016 |
Sales and settlements | 0 | (7,016) |
Transfers into Level 3 | 0 | 0 |
Ending balance | $ 40,201 | $ 49,061 |

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