Employee Benefit Plans (Narrative) (Details) $ / shares in Units, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022 USD ($) shares	Sep. 30, 2021 USD ($) shares	Sep. 30, 2022 USD ($) plan $ / shares shares	Sep. 30, 2021 USD ($) shares
Defined Benefit Plan Disclosure [Line Items]
Number of stock option plans | plan			1
Deferred tax benefit from stock options exercised	$ 64		$ 147	$ 9
Options, exercises in period, intrinsic value	$ 9		$ 565	$ 220
Exercise of options | shares	603	0	32,003	19,040
Deferred Salary Reduction Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Contribution to the Plan	$ 419	$ 287	$ 1,266	$ 925
Stock Options [Member]
Defined Benefit Plan Disclosure [Line Items]
Share-based compensation expense	0	0	0	0
Options, outstanding, intrinsic value	607,000		607,000
Proceeds from options exercised			270
Stock Appreciation Rights (SARs) [Member]
Defined Benefit Plan Disclosure [Line Items]
Share-based compensation expense	(31)	49		162
Share-based compensation income			$ 12
Exercise of options | shares			12,500
Restricted Stock [Member]
Defined Benefit Plan Disclosure [Line Items]
Share-based compensation expense	281	$ 163	$ 991	$ 525
Unrecognized compensation cost	$ 1,200		$ 1,200
Unrecognized compensation costs, period for recognition			2 years 29 days
Grant-date fair value			$ 824
Vested (in shares) | shares			34,146
Nonvested, beginning of period (in shares) | shares			144,367
Nonvested, beginning balance (in dollars per share) | $ / shares			$ 19.49
2015 Stock Incentive Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Rights available for grant (in shares) | shares	1,766,245		1,766,245
Cornerstone Non-Qualified Plan Options [Member]
Defined Benefit Plan Disclosure [Line Items]
Rights issued (in shares) | shares			30,790
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%