Marketable Securities (Schedule of Available-for-Sale Debt Securities by Maturity) (Details) - USD ($) $ in Thousands	Jun. 30, 2024	Dec. 31, 2023
Cost
Within one year	$ 0	$ 0
After one year through five years	5,176	5,679
After 5 years through 10 years	18,888	31,162
After 10 years	125,515	90,840
Available for sale debt securities, cost	149,579	127,681
Fair Value
Within one year	0	0
After one year through five years	4,708	5,035
After 5 years through 10 years	17,078	28,084
After 10 years	116,257	85,633
Available for sale debt securities, fair value	$ 138,043	$ 118,752

Amortized cost of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

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