Employee Benefit Plans (Narrative) (Details) $ / shares in Units, $ in Thousands	3 Months Ended
	Mar. 31, 2022 USD ($) plan $ / shares shares	Mar. 31, 2021 USD ($) shares
Defined Benefit Plan Disclosure [Line Items]
Contribution to the Plan	$ 393	$ 288
Number of stock option plans | plan	1
Deferred tax benefit from stock options exercised	$ 76	$ 1
Exercise of options | shares	27,550	15,965
Stock Options [Member]
Defined Benefit Plan Disclosure [Line Items]
Options, exercises in period, intrinsic value	$ 506	$ 192
Options, outstanding, intrinsic value	741,000
Proceeds from options exercised	217
Stock Appreciation Rights (SARs) [Member]
Defined Benefit Plan Disclosure [Line Items]
Share-based compensation expense	$ (26)	49
Exercise of options | shares	4,500
Restricted Stock [Member]
Defined Benefit Plan Disclosure [Line Items]
Share-based compensation expense	$ 312	$ 201
Unrecognized compensation cost	$ 1,700
Unrecognized compensation costs, period for recognition	2 years 8 months 26 days
Grant-date fair value	$ 84
Vested (in shares) | shares	4,167
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	1,767,518
Cornerstone Non-Qualified Plan Options [Member]
Defined Benefit Plan Disclosure [Line Items]
Rights issued (in shares) | shares	33,500
Capstone Stock Option Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Rights issued (in shares) | shares	2,266
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%