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Investments (Amortized Cost And Fair Value Of Debt Securities, By Contractual Maturity) (Details) - USD ($) $ in Thousands	Jun. 30, 2022	Dec. 31, 2021
Schedule of Available-for-sale Securities [Line Items]
Amortized cost	$ 554,357	$ 525,717
Fair Value	509,787	$ 529,811
Debt Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Due in one year or less, Amortized cost	4,617
Due after one year through five years, Amortized cost	14,688
Due after five years through ten years, Amortized cost	147,650
Due after ten years, Amortized cost	156,792
Amortized cost	323,747
Due in one year or less, Fair value	4,617
Due after one year through five years, Fair value	14,424
Due after five years through ten years, Fair value	134,703
Due after ten years, Fair value	137,348
Fair Value	291,092
Mortgage And Asset-Backed Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Mortgage-backed securities, Amortized cost	230,610
Mortgage-backed securities, Fair value	$ 218,695

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