Investments (Schedule of Amortized Cost and Estimated Fair Value of Debt Securities by Contractual Maturities) (Details) - USD ($) $ in Thousands	Jun. 30, 2023	Dec. 31, 2022
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost, Due in one year or less	$ 178,363
Amortized Cost, Due after one year through five years	97,494
Amortized Cost, Due after five years through ten years	16,008
Amortized Cost, Amortized Cost Due after ten years	6,226
Amortized Cost	299,544	$ 434,119
Fair Value, Due in one year or less	176,716
Fair Value, Due after one year through five years	95,891
Fair Value, Due after five years through ten years	15,958
Fair Value, Due after ten years	5,958
Fair Value	295,761	426,597
Mortgage-backed [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	1,453	1,510
Fair Value	$ 1,238	$ 1,374