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Investments (Amortized Cost And Fair Value Of Debt Securities, By Contractual Maturity) (Details) - USD ($)	Sep. 30, 2020	Dec. 31, 2019
Investments [Abstract]
Due in one year or less, Amortized cost	$ 5,925,000
Due after one year through five years, Amortized cost	23,217,000
Due after five years through ten years, Amortized cost	174,099,000
Due after ten years, Amortized cost	32,763,000
Amortized Cost Contractual Maturities Subtotal	236,004,000
Mortgage-backed securities, Amortized cost	100,926,000
Available-for-sale Securities, Debt Maturities, Amortized cost	336,930,000
Due in one year or less, Fair value	5,960,000
Due after one year through five years, Fair value	23,715,000
Due after five years through ten years, Fair value	180,496,000
Due after ten years, Fair value	33,819,000
Fair Value Contractual Maturities Subtotal	243,990,000
Mortgage-backed securities, Fair value	102,483,000
Available-for-sale Securities, Debt Securities, Fair Value	$ 346,473,000	$ 187,433,000

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