CONSOLIDATED STATEMENTS OF SHAREHOLDERS' EQUITY - USD ($) $ in Thousands	Total	Cumulative Effect, Period of Adoption, Adjustment	Cumulative Effect, Period of Adoption, Adjusted Balance	Common Shares	Common Shares Cumulative Effect, Period of Adoption, Adjustment	Common Shares Cumulative Effect, Period of Adoption, Adjusted Balance	Retained Earnings	Retained Earnings Cumulative Effect, Period of Adoption, Adjustment	Retained Earnings Cumulative Effect, Period of Adoption, Adjusted Balance	Treasury Shares	Treasury Shares Cumulative Effect, Period of Adoption, Adjustment	Treasury Shares Cumulative Effect, Period of Adoption, Adjusted Balance	Accumulated Other Comprehensive Income (Loss)	Accumulated Other Comprehensive Income (Loss) Cumulative Effect, Period of Adoption, Adjustment	Accumulated Other Comprehensive Income (Loss) Cumulative Effect, Period of Adoption, Adjusted Balance
Balance (in shares) at Dec. 31, 2017				10,023,059		10,023,059
Balance at beginning of year at Dec. 31, 2017	$ 150,271	$ 0	$ 150,271	$ 76,977	$ 0	$ 76,977	$ 87,301	$ 525	$ 87,826	$ (11,665)	$ 0	$ (11,665)	$ (2,342)	$ (525)	$ (2,867)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	14,845			0			14,845			0			0
Other comprehensive income, net of taxes	(1,852)			$ 0			0			0			(1,852)
Dividend Reinvestment and Stock Purchase Plan (in shares)				22,936
Dividend Reinvestment and Stock Purchase Plan	416			$ 416			0			0			0
Acquisition of BNB Bancorp, Inc. (in shares)				3,253,060
Stock issued for acquisition of Columbus First Bancorp, Inc.	63,598			$ 63,598			0			0			0
Exercise of stock options (in shares)				6,987
Exercise of stock options	72			$ 72			0			0			0
Treasury Stock, Shares, Acquired				21,400
Payments for Repurchase of Common Stock	348			$ 0			0			348			0
Compensation expense relating to restricted stock (in shares)				10,634
Compensation expense relating to restricted stock	$ 107			$ 107			0			0			0
Dividends, Common Stock, Stock				0
Common Stock, Dividends, Per Share, Declared	$ 0.65
Dividends, Common Stock, Cash	$ (8,124)			$ 0			(8,124)			0			0
Balance (in shares) at Dec. 31, 2018				13,295,276
Balance at end of year at Dec. 31, 2018	218,985			$ 141,170			94,547			(12,013)			(4,719)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	18,912			0			18,912			0			0
Other comprehensive income, net of taxes	5,392			$ 0			0			0			5,392
Dividend Reinvestment and Stock Purchase Plan (in shares)				25,629
Dividend Reinvestment and Stock Purchase Plan	446			$ 446			0			0			0
Exercise of stock options (in shares)				3,374
Exercise of stock options	41			$ 41			0			0			0
Treasury Stock, Shares, Acquired				400,000
Payments for Repurchase of Common Stock	6,834			$ 0			0			6,834			0
Compensation expense relating to restricted stock (in shares)				12,504
Compensation expense relating to restricted stock	$ 134			$ 134			0			0			0
Dividends, Common Stock, Stock				0
Common Stock, Dividends, Per Share, Declared	$ 0.69
Dividends, Common Stock, Cash	$ (9,028)			$ 0			(9,028)			0			0
Balance (in shares) at Dec. 31, 2019	12,936,783			12,936,783
Balance at end of year at Dec. 31, 2019	$ 228,048			$ 141,791			104,431			(18,847)			673
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	20,075			0			20,075			0			0
Other comprehensive income, net of taxes	3,370			$ 0			0			0			3,370
Dividend Reinvestment and Stock Purchase Plan (in shares)				26,840
Dividend Reinvestment and Stock Purchase Plan	401			$ 401			0			0			0
Exercise of stock options (in shares)				9,593
Exercise of stock options	114			$ 114			0			0			0
Treasury Stock, Shares, Acquired				130,552
Payments for Repurchase of Common Stock	1,872			$ 0			0			1,872			0
Compensation expense relating to restricted stock (in shares)				15,661
Compensation expense relating to restricted stock	$ 137			$ 137			0			0			0
Dividends, Common Stock, Stock				0
Common Stock, Dividends, Per Share, Declared	$ 0.73
Dividends, Common Stock, Cash	$ (9,448)			$ 0			(9,448)			0			0
Balance (in shares) at Dec. 31, 2020	12,858,325			12,858,325
Balance at end of year at Dec. 31, 2020	$ 240,825			$ 142,443			$ 115,058			$ (20,719)			$ 4,043