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Investments (Amortized Cost And Fair Value Of Debt Securities, By Contractual Maturity) (Details) - USD ($)	Jun. 30, 2021	Dec. 31, 2020
Investments [Abstract]
Due in one year or less, Amortized cost	$ 2,804,000
Due after one year through five years, Amortized cost	22,439,000
Due after five years through ten years, Amortized cost	248,520,000
Due after ten years, Amortized cost	49,579,000
Amortized Cost Contractual Maturities Subtotal	323,342,000
Mortgage-backed securities, Amortized cost	179,303,000
Available-for-sale Securities, Debt Maturities, Amortized cost	502,645,000
Due in one year or less, Fair value	2,829,000
Due after one year through five years, Fair value	23,044,000
Due after five years through ten years, Fair value	256,445,000
Due after ten years, Fair value	49,079,000
Fair Value Contractual Maturities Subtotal	331,397,000
Mortgage-backed securities, Fair value	180,850,000
Available-for-sale Securities, Debt Securities, Fair Value	$ 512,247,000	$ 396,940,000

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