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Investments (Narrative) (Details)	9 Months Ended	12 Months Ended
	Sep. 30, 2020 USD ($) item	Dec. 31, 2019 USD ($) item
Schedule of Available-for-sale Securities [Line Items]
Fair Value	$ 346,473,000	$ 187,433,000
Number of temporarily impaired securities | item	105	144
Temporarily impaired fair value	$ 91,000,000
Unrealized Losses	1,043,000	$ 1,686,000
Unrealized Gain (Loss) on Securities		(643,000)
Restricted stock	468,000	465,000
Equity securities	301,000	440,000
Public Funds And Trust Deposits [Member]
Schedule of Available-for-sale Securities [Line Items]
Fair Value	$ 140,500,000	$ 107,100,000

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Amount of accumulated pre-tax unrealized loss on securities classified as available-for-sale impacting investments.

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Number of investment positions in available-for-sale investments in a continuous unrealized loss position for which an other-than-temporary impairment (OTTI) has not been recognized in the income statement.

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Amount of investment in equity security measured at fair value with change in fair value recognized in net income (FV-NI).

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Federal Home Loan Bank (FHLB) stock represents an equity interest in a FHLB. It does not have a readily determinable fair value because its ownership is restricted and it lacks a market (liquidity).

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Amount of other-than-temporary impairment (OTTI) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), recognized in earnings and other comprehensive loss (OCI).

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Amount of unrealized gain (loss) recognized in the income statement on unsold other securities.

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