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