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Investments (Amortized Cost And Fair Value Of Debt Securities, By Contractual Maturity) (Details) - USD ($)	Mar. 31, 2021	Dec. 31, 2020
Investments [Abstract]
Due in one year or less, Amortized cost	$ 2,361,000
Due after one year through five years, Amortized cost	21,738,000
Due after five years through ten years, Amortized cost	174,745,000
Due after ten years, Amortized cost	80,302,000
Amortized Cost Contractual Maturities Subtotal	279,146,000
Mortgage-backed securities, Amortized cost	141,038,000
Available-for-sale Securities, Debt Maturities, Amortized cost	420,184,000
Due in one year or less, Fair value	2,367,000
Due after one year through five years, Fair value	22,274,000
Due after five years through ten years, Fair value	178,862,000
Due after ten years, Fair value	76,828,000
Fair Value Contractual Maturities Subtotal	280,331,000
Mortgage-backed securities, Fair value	141,847,000
Available-for-sale Securities, Debt Securities, Fair Value	$ 422,178,000	$ 396,940,000

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