Consolidated Statements of Changes in Shareholders' Equity - USD ($) shares in Thousands, $ in Thousands		Common stock	Retained earnings	Accumulated other comprehensive (loss) income	Treasury stock	Total
Beginning Balance (in shares) at Dec. 31, 2019		10,881
Beginning balance at Dec. 31, 2019		$ 90,113	$ 70,442	$ 154		$ 160,709
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income			5,368			5,368
Other comprehensive income (loss), net of tax				(986)		(986)
Dividends on common stock		$ 30	(871)			(841)
Common stock issued and related tax effects (in shares)		13
Common stock issued and related tax effects		$ 227				227
Treasury stock purchased, at cost					$ (172)	(172)
Treasury stock purchased, at cost (in shares)		(11)
Ending Balance (in shares) at Mar. 31, 2020		10,883
Ending balance at Mar. 31, 2020		$ 90,370	74,939	(832)	(172)	164,305
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Retained earnings						$ 90,669
Beginning Balance (in shares) at Dec. 31, 2020		10,456				10,456
Beginning balance at Dec. 31, 2020		$ 91,873	90,669	(1,189)	(7,442)	$ 173,911
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income			8,496			8,496
Other comprehensive income (loss), net of tax				655		655
Dividends on common stock		$ 30	(834)			(804)
Common stock issued and related tax effects (in shares)	[1]	36
Common stock issued and related tax effects	[1]	$ 277				277
Treasury stock purchased, at cost					(1,349)	$ (1,349)
Treasury stock purchased, at cost (in shares)		(70)
Ending Balance (in shares) at Mar. 31, 2021		10,422				10,422
Ending balance at Mar. 31, 2021		$ 92,180	$ 98,331	$ (534)	$ (8,791)	$ 181,186
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Retained earnings						$ 98,331

[1] Includes the issuance of common stock under employee benefit plans, which includes nonqualified stock options and restricted stock expense related entries, employee option exercises and the tax benefit of options exercised.