Investments (Schedule of Amortized Cost and Estimated Fair Value of Debt Securities by Contractual Maturities) (Details) - USD ($) $ in Thousands	Jun. 30, 2022	Dec. 31, 2021
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost, Due in one year or less	$ 88,002
Amortized Cost, Due after one year through five years	287,111
Amortized Cost, Due after five years through ten years	58,138
Amortized Cost, Amortized Cost Due after ten years	7,326
Amortized Cost	442,218	$ 288,175
Fair Value, Due in one year or less	87,501
Fair Value, Due after one year through five years	283,125
Fair Value, Due after five years through ten years	55,924
Fair Value, Due after ten years	7,128
Fair Value	435,266	290,073
Collateralized Mortgage Backed Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	1,641	1,830
Fair Value	$ 1,588	$ 1,855