CONSOLIDATED STATEMENT OF CHANGES IN STOCKHOLDERS' EQUITY - USD ($) $ in Thousands	Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	AOCI Attributable to Parent [Member]	Total
BALANCE at Dec. 31, 2019	$ 14,008	$ 232,732	$ 65,839	$ 168	$ 312,747
BALANCE (in shares) at Dec. 31, 2019	14,008,233
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income			15,302		15,302
Other comprehensive income				844	844
Exercise of stock options	$ 28	254			282
Exercise of stock options (in shares)	27,858
Restricted stock	$ 36	(36)
Restricted stock (in shares)	36,113
Common stock issued to shareholders	$ 1,293	23,254			24,547
Common stock issued to shareholders (in shares)	1,292,578
Stock compensation expense		365			365
Common stock dividends			(2,223)		(2,223)
Repurchases of common stock	$ (132)	(1,943)			(2,075)
Repurchases of common stock (in shares)	(131,555)
BALANCE at Sep. 30, 2020	$ 15,233	254,626	78,918	1,012	349,789
BALANCE (in shares) at Sep. 30, 2020	15,233,227
BALANCE at Jun. 30, 2020	$ 15,217	254,396	73,283	592	343,488
BALANCE (in shares) at Jun. 30, 2020	15,216,932
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income			6,395		6,395
Other comprehensive income				420	420
Exercise of stock options	$ 12	92			104
Exercise of stock options (in shares)	12,500
Restricted stock	$ 4	(4)
Restricted stock (in shares)	3,795
Stock compensation expense		142			142
Common stock dividends			(760)		(760)
BALANCE at Sep. 30, 2020	$ 15,233	254,626	78,918	1,012	349,789
BALANCE (in shares) at Sep. 30, 2020	15,233,227
BALANCE at Dec. 31, 2020	$ 15,107	252,693	87,185	2,183	357,168
BALANCE (in shares) at Dec. 31, 2020	15,107,214
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income			28,134		28,134
Other comprehensive income				376	376
Exercise of stock options	$ 19	175			194
Exercise of stock options (in shares)	19,165
Restricted stock	$ 43	(43)
Restricted stock (in shares)	43,143
Common stock issued to shareholders	$ 1,691	40,563			42,254
Common stock issued to shareholders (in shares)	1,691,535
Stock compensation expense		521			521
Common stock dividends			(2,719)		(2,719)
Repurchases of common stock	$ (59)	(1,149)			(1,208)
Repurchases of common stock (in shares)	(59,610)
BALANCE at Sep. 30, 2021	$ 16,801	292,760	112,600	2,559	424,720
BALANCE (in shares) at Sep. 30, 2021	16,801,447
BALANCE at Jun. 30, 2021	$ 15,110	252,039	103,906	2,338	373,393
BALANCE (in shares) at Jun. 30, 2021	15,109,736
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income			9,600		9,600
Other comprehensive income				221	221
Restricted stock (in shares)	176
Common stock issued to shareholders	$ 1,691	40,563			42,254
Common stock issued to shareholders (in shares)	1,691,535
Stock compensation expense		158			158
Common stock dividends			(906)		(906)
BALANCE at Sep. 30, 2021	$ 16,801	$ 292,760	$ 112,600	$ 2,559	$ 424,720
BALANCE (in shares) at Sep. 30, 2021	16,801,447