Employee Benefit Plans (Narrative) (Details) $ / shares in Units, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023 USD ($) shares	Sep. 30, 2022 USD ($) shares	Sep. 30, 2023 USD ($) plan $ / shares shares	Sep. 30, 2022 USD ($) shares
Defined Benefit Plan Disclosure [Line Items]
Contribution to the Plan	$ 475	$ 419	$ 1,400	$ 1,300
Number of stock option plans | plan			1
Deferred tax benefit from stock options exercised		64	$ 60	147
Options, exercises in period, intrinsic value		$ 9	$ 242	$ 565
Exercise of options | shares	0	603	15,705	32,003
Employee Stock Option [Member]
Defined Benefit Plan Disclosure [Line Items]
Share-based compensation expense	$ 0	$ 0	$ 0	$ 0
Options, outstanding, intrinsic value	128,000		128,000
Proceeds from options exercised			165
Stock Appreciation Rights (SARs) [Member]
Defined Benefit Plan Disclosure [Line Items]
Share-based compensation expense	(5)	(31)
Share-based compensation income			$ (118)	(12)
Exercise of options | shares			8,000
Restricted Stock [Member]
Defined Benefit Plan Disclosure [Line Items]
Share-based compensation expense	271	$ 281	$ 1,200	$ 991
Unrecognized compensation cost	$ 1,800		$ 1,800
Unrecognized compensation costs, period for recognition			1 year 11 months 19 days
Grant-date fair value			$ 636
Vested (in shares) | shares			27,172
Nonvested, beginning of period (in shares) | shares			129,836
Nonvested, beginning balance (in dollars per share) | $ / shares			$ 19.61
2015 Stock Incentive Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Rights issued (in shares) | shares			11,840
Rights available for grant (in shares) | shares	1,676,663		1,676,663
Cornerstone Non-Qualified Plan Options [Member]
Defined Benefit Plan Disclosure [Line Items]
Rights issued (in shares) | shares			4,500
401 (k) Matching Range One [Member] | Deferred Salary Reduction Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Employer matching contribution, percent of match			100.00%
Employer matching contribution, percent of employees gross pay			3.00%
401 (k) Matching Range Two [Member] | Deferred Salary Reduction Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Employer matching contribution, percent of match			50.00%
Employer matching contribution, percent of employees gross pay			2.00%