Derivative Financial Instruments (Narrative) (Details) $ in Thousands	1 Months Ended	12 Months Ended
	Mar. 31, 2016 USD ($) contract	Dec. 31, 2023 USD ($)	Dec. 31, 2022 USD ($)
Derivative [Line Items]
Cash flow hedge ineffectiveness		$ 100
Cash flow hedge ineffectiveness		Interest rate swap agreements are entered into with counterparties that meet established credit standards and the Corporation believes that the credit risk inherent in these contracts is not significant at December 31, 2023.
Decrease in value on derivatives		$ 300
Accumulated Gain (Loss), Net, Cash Flow Hedge, Parent [Member]
Derivative [Line Items]
Unrealized holding (losses)/gains on investments		(310)	$ 1,521
Unrealized tax (expense) benefit		(82)	405
Interest Rate Swap Agreements [Member]
Derivative [Line Items]
Interest rate swap notional amount	$ 30,000	15,000
Number of interest rate swap contracts | contract	4
Interest rate swap fair value		$ 800	$ 1,100
Derivative, fixed interest rate		4.645%