Consolidated Statements of Changes in Stockholders' Equity (unaudited) - USD ($) shares in Thousands, $ in Thousands	Total	Common Stock	Paid-In Capital	Retained Earnings	Accumulated Other Comprehensive Income (Loss)
Balance at beginning of period (in shares) at Dec. 31, 2019		9,499
Balance at beginning of period at Dec. 31, 2019	$ 130,506	$ 9,499	$ 43,667	$ 76,978	$ 362
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Change in net unrealized gains on securities available for sale, net of reclassification adjustment and tax effects	6,234				6,234
Dividends on common shares	(2,850)			(2,850)
Goodwill adjustment	(485)		(485)
Stock-based compensation expense	25		25
Net income	6,916			6,916
Balance at end of period (in shares) at Sep. 30, 2020		9,499
Balance at end of period at Sep. 30, 2020	140,346	$ 9,499	43,207	81,044	6,596
Balance at beginning of period (in shares) at Jun. 30, 2020		9,499
Balance at beginning of period at Jun. 30, 2020	138,594	$ 9,499	43,199	78,895	7,001
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Change in net unrealized gains on securities available for sale, net of reclassification adjustment and tax effects	(405)				(405)
Dividends on common shares	(950)			(950)
Goodwill adjustment	0
Stock-based compensation expense	8		8
Net income	3,099			3,099
Balance at end of period (in shares) at Sep. 30, 2020		9,499
Balance at end of period at Sep. 30, 2020	140,346	$ 9,499	43,207	81,044	6,596
Balance at beginning of period (in shares) at Dec. 31, 2020		9,499
Balance at beginning of period at Dec. 31, 2020	144,488	$ 9,499	43,215	84,993	6,781
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Change in net unrealized gains on securities available for sale, net of reclassification adjustment and tax effects	(10,192)				(10,192)
Dividends on common shares	(3,348)			(3,348)
Issuance of common stock (in shares)		3,988
Issuance of common stock	71,383	$ 3,988	67,395
Issuance of restricted stock (in shares)		187
Issuance of restricted stock	187	$ 187
Stock-based compensation expense	112		112
Net income	14,500			14,500
Balance at end of period (in shares) at Sep. 30, 2021		13,674
Balance at end of period at Sep. 30, 2021	217,130	$ 13,674	110,722	96,145	(3,411)
Balance at beginning of period (in shares) at Jun. 30, 2021		9,499
Balance at beginning of period at Jun. 30, 2021	146,894	$ 9,499	43,232	91,963	2,200
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Change in net unrealized gains on securities available for sale, net of reclassification adjustment and tax effects	(5,611)				(5,611)
Dividends on common shares	(1,401)			(1,401)
Issuance of common stock (in shares)		3,988
Issuance of common stock	71,383	$ 3,988	67,395
Issuance of restricted stock (in shares)		187
Issuance of restricted stock	187	$ 187
Stock-based compensation expense	95		95
Net income	5,583			5,583
Balance at end of period (in shares) at Sep. 30, 2021		13,674
Balance at end of period at Sep. 30, 2021	$ 217,130	$ 13,674	$ 110,722	$ 96,145	$ (3,411)