Consolidated Statements of Changes in Shareholders' Equity - USD ($) shares in Thousands, $ in Thousands		Common stock	Retained earnings	Accumulated other comprehensive income (loss)	Treasury stock	Total
Beginning Balance (in shares) at Dec. 31, 2020		10,456
Beginning balance at Dec. 31, 2020		$ 91,873	$ 90,669	$ (1,189)	$ (7,442)	$ 173,911
Increase (Decrease) in Stockholders' Equity
Net income			8,496			8,496
Other comprehensive income, net of tax				655		655
Dividends on common stock		$ 30	(834)			(804)
Common stock issued and related tax effects (1) (in shares)	[1]	36
Common stock issued and related tax effects (1)	[1]	$ 277				277
Acquisition of treasury stock, at cost (in shares)		(70)
Acquisition of treasury stock, at cost					(1,349)	(1,349)
Ending Balance (in shares) at Mar. 31, 2021		10,422
Ending balance at Mar. 31, 2021		$ 92,180	98,331	(534)	(8,791)	181,186
Beginning Balance (in shares) at Dec. 31, 2020		10,456
Beginning balance at Dec. 31, 2020		$ 91,873	90,669	(1,189)	(7,442)	173,911
Increase (Decrease) in Stockholders' Equity
Net income						16,914
Other comprehensive income, net of tax				992		992
Ending Balance (in shares) at Jun. 30, 2021		10,416
Ending balance at Jun. 30, 2021		$ 92,810	105,811	(197)	(9,668)	188,756
Beginning Balance (in shares) at Mar. 31, 2021		10,422
Beginning balance at Mar. 31, 2021		$ 92,180	98,331	(534)	(8,791)	181,186
Increase (Decrease) in Stockholders' Equity
Net income			8,418			8,418
Other comprehensive income, net of tax				337		337
Dividends on common stock		$ 33	(938)			(905)
Common stock issued and related tax effects (1) (in shares)	[1]	34
Common stock issued and related tax effects (1)	[1]	$ 597				597
Acquisition of treasury stock, at cost (in shares)		(40)
Acquisition of treasury stock, at cost					(877)	(877)
Ending Balance (in shares) at Jun. 30, 2021		10,416
Ending balance at Jun. 30, 2021		$ 92,810	105,811	(197)	(9,668)	$ 188,756
Beginning Balance (in shares) at Dec. 31, 2021		10,391				10,391
Beginning balance at Dec. 31, 2021		$ 94,003	123,037	322	(11,633)	$ 205,729
Increase (Decrease) in Stockholders' Equity
Net income			9,108			9,108
Other comprehensive income, net of tax				286		286
Dividends on common stock		$ 37	(1,045)			(1,008)
Common stock issued and related tax effects (1) (in shares)	[1]	102
Common stock issued and related tax effects (1)	[1]	$ 813				813
Ending Balance (in shares) at Mar. 31, 2022		10,493
Ending balance at Mar. 31, 2022		$ 94,853	131,100	608	(11,633)	$ 214,928
Beginning Balance (in shares) at Dec. 31, 2021		10,391				10,391
Beginning balance at Dec. 31, 2021		$ 94,003	123,037	322	(11,633)	$ 205,729
Increase (Decrease) in Stockholders' Equity
Net income						18,559
Other comprehensive income, net of tax				(2,944)		$ (2,944)
Ending Balance (in shares) at Jun. 30, 2022		10,511				10,511
Ending balance at Jun. 30, 2022		$ 95,650	139,394	(2,622)	(11,633)	$ 220,789
Beginning Balance (in shares) at Mar. 31, 2022		10,493
Beginning balance at Mar. 31, 2022		$ 94,853	131,100	608	(11,633)	214,928
Increase (Decrease) in Stockholders' Equity
Net income			9,451			9,451
Other comprehensive income, net of tax				(3,230)		(3,230)
Dividends on common stock		$ 43	(1,157)			(1,114)
Common stock issued and related tax effects (1) (in shares)	[1]	18
Common stock issued and related tax effects (1)	[1]	$ 754				$ 754
Ending Balance (in shares) at Jun. 30, 2022		10,511				10,511
Ending balance at Jun. 30, 2022		$ 95,650	$ 139,394	$ (2,622)	$ (11,633)	$ 220,789

[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.