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Investments (Summary of Amortized Costs and Estimated Fair Values of Available-For-Sale Securities) (Details) - USD ($) $ in Thousands	Dec. 31, 2024	Dec. 31, 2023
Debt Securities, Available-for-sale [Abstract]
Amortized Cost	$ 673,003	$ 702,937
Unrealized Gains	855	1,793
Unrealized Losses	(80,109)	(78,922)
Fair Value	593,749	625,808
Obligations of states and political subdivisions
Debt Securities, Available-for-sale [Abstract]
Amortized Cost	5,423	6,429
Unrealized Gains	0	1
Unrealized Losses	(134)	(44)
Fair Value	5,289	6,386
MBS issued or guaranteed by U.S. government-sponsored enterprises
Debt Securities, Available-for-sale [Abstract]
Amortized Cost	493,766	525,439
Unrealized Gains	353	630
Unrealized Losses	(69,163)	(65,978)
Fair Value	424,956	460,091
CMO issued or guaranteed by U.S. government-sponsored enterprises
Debt Securities, Available-for-sale [Abstract]
Amortized Cost	156,131	149,387
Unrealized Gains	502	1,161
Unrealized Losses	(9,154)	(9,537)
Fair Value	147,479	141,011
Subordinated corporate bonds
Debt Securities, Available-for-sale [Abstract]
Amortized Cost	17,683	21,682
Unrealized Gains		1
Unrealized Losses	(1,658)	(3,363)
Fair Value	$ 16,025	$ 18,320

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- Definition

Amount, before tax, of unrealized gain in accumulated other comprehensive income (AOCI) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

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