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Fair Value (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2021	Dec. 31, 2020
Fair Value [Abstract]
Term of variable rate	30 days
Contingent Consideration [Member]
Changes in Fair Value of Level 3 Contingent Consideration [Roll Forward]
Beginning balance	$ (3,125)
Additions from acquisitions	(8,702)
Changes in fair value of contingent consideration	(203)
Ending balance	(12,030)
Fair Value on a Recurring Basis [Member]
Financial Assets (Liabilities) [Abstract]
Cash equivalents and current investments	69,414	$ 56,628
Derivative financial instruments asset	4,304	1,145
Life insurance contracts	49,061	45,453
Derivative financial instruments liability	(97)	(105)
Contingent consideration	(12,030)	(3,125)
Financial assets (liabilities)	110,652	99,996
Fair Value on a Recurring Basis [Member] | Level 1 [Member]
Financial Assets (Liabilities) [Abstract]
Cash equivalents and current investments	69,414	56,628
Derivative financial instruments asset	0	0
Life insurance contracts	0	0
Derivative financial instruments liability	0	0
Contingent consideration	0	0
Financial assets (liabilities)	69,414	56,628
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	4,304	1,145
Life insurance contracts	0	0
Derivative financial instruments liability	(97)	(105)
Contingent consideration	0	0
Financial assets (liabilities)	4,207	1,040
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	49,061	45,453
Derivative financial instruments liability	0	0
Contingent consideration	(12,030)	(3,125)
Financial assets (liabilities)	37,031	$ 42,328
Life Insurance Contracts [Member]
Changes in Fair Value of Level 3 Marketable Securities [Roll Forward]
Beginning balance	45,453
Actual return on plan assets	3,608
Purchase and issuances	7,016
Sales and settlements	(7,016)
Transfers into Level 3	0
Ending balance	$ 49,061

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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 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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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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Amount of transfer of financial instrument classified as an asset into level 3 of the fair value hierarchy.

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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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Fair value of asset after deduction of liability.

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