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Fair Value and Equity Investments, Fair Value (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
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	3,977	1,486
Ending balance	(6,364)	(10,341)
Fair Value on a Recurring Basis [Member]
Financial Assets (Liabilities) [Abstract]
Cash equivalents and current investments	55,356	66,477
Derivative financial instruments asset	19,738	6,590
Life insurance contracts	40,055	49,851
Contingent consideration	(6,364)	(10,341)
Financial assets (liabilities)	108,785	112,577
Restricted current investments	4,900	5,200
Fair Value on a Recurring Basis [Member] | Level 1 [Member]
Financial Assets (Liabilities) [Abstract]
Cash equivalents and current investments	55,356	66,477
Derivative financial instruments asset	0	0
Life insurance contracts	0	0
Contingent consideration	0	0
Financial assets (liabilities)	55,356	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	19,738	6,590
Life insurance contracts	0	0
Contingent consideration	0	0
Financial assets (liabilities)	19,738	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	40,055	49,851
Contingent consideration	(6,364)	(10,341)
Financial assets (liabilities)	33,691	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	(9,180)	5,153
Purchases and issuances	0	6,261
Sales and settlements	(616)	(7,016)
Ending balance	$ 40,055	$ 49,851

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Fair value portion of cash equivalents with banks or financial institutions and current investments, including trading securities, available-for-sale securities, held-to-maturity securities, and short-term investments classified as other and current.

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Amount of purchases and issuances of financial instrument classified as an asset measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing.

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Amount of sale and settlement of financial instrument classified as an asset measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing.

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Amount of liability recognized arising from contingent consideration in a business combination.

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Fair value portion of the amount that could be realized under a life insurance contract or contracts owned by the entity, commonly known as corporate-owned life insurance (COLI) or bank-owned life insurance (BOLI).

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Fair value, after the effects of master netting arrangements, of a financial asset or other contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes assets not subject to a master netting arrangement and not elected to be offset.

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A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

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Amount of gain (loss) recognized in income from asset measured at fair value on recurring basis using unobservable input (level 3).

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Fair value of financial instrument classified as an asset measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing.

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Amount of gain (loss) recognized in income from liability measured at fair value on recurring basis using unobservable input (level 3).

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Amount of purchases of financial instrument classified as a liability measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing.

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Fair value of asset after deduction of liability.

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The aggregate value of all restricted investments.

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