CONSOLIDATED STATEMENTS OF SHAREHOLDERS' EQUITY - USD ($) $ in Thousands	Total	Common Shares	Retained Earnings	Treasury Shares	Accumulated Other Comprehensive Income (Loss)	Calculated under Revenue Guidance in Effect before Topic 606 [Member]	Calculated under Revenue Guidance in Effect before Topic 606 [Member] Common Shares	Calculated under Revenue Guidance in Effect before Topic 606 [Member] Retained Earnings	Calculated under Revenue Guidance in Effect before Topic 606 [Member] Treasury Shares	Calculated under Revenue Guidance in Effect before Topic 606 [Member] Accumulated Other Comprehensive Income (Loss)	Difference between Revenue Guidance in Effect before and after Topic 606 [Member]	Difference between Revenue Guidance in Effect before and after Topic 606 [Member] Retained Earnings	Difference between Revenue Guidance in Effect before and after Topic 606 [Member] Accumulated Other Comprehensive Income (Loss)
Balance (in shares) at Dec. 31, 2016		9,998,025
Balance at beginning of year at Dec. 31, 2016	$ 142,944	$ 76,490	$ 80,736	$ (11,665)	$ (2,617)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	12,972		12,972
Other comprehensive income, net of taxes	275				275
Dividend Reinvestment and Stock Purchase Plan (in shares)		17,609
Dividend Reinvestment and Stock Purchase Plan	360	$ 360
Exercise of stock options (in shares)		3,398
Exercise of stock options	51	$ 51
Payments for Repurchase of Common Stock	0
APIC, Share-based Payment Arrangement, Option, Increase for Cost Recognition	1	$ 1
Compensation expense relating to restricted stock (in shares)		4,027
Compensation expense relating to restricted stock	75	$ 75
Common stock dividends, $0.69 per share	(6,407)		(6,407)
Balance (in shares) at Dec. 31, 2017		10,023,059					10,023,059
Balance at end of year at Dec. 31, 2017	150,271	$ 76,977	87,826	(11,665)	(2,867)	$ 150,271	$ 76,977	$ 87,301	$ (11,665)	$ (2,342)
Cumulative effect of changes in accounting principles | Accounting Standards Update 2014-09 [Member]											$ 0	$ 525	$ (525)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	14,845		14,845
Other comprehensive income, net of taxes	(1,852)				(1,852)
Dividend Reinvestment and Stock Purchase Plan (in shares)		22,936
Dividend Reinvestment and Stock Purchase Plan	416	$ 416
Acquisition of BNB Bancorp, Inc. (in shares)		3,253,060
Stock issued for acquisition of Columbus First Bancorp, Inc.	63,598	$ 63,598
Exercise of stock options (in shares)		6,987
Exercise of stock options	72	$ 72
Treasury Stock, Shares, Acquired		21,400
Payments for Repurchase of Common Stock	348			348
Compensation expense relating to restricted stock (in shares)		10,634
Compensation expense relating to restricted stock	107	$ 107
Common stock dividends, $0.69 per share	(8,124)		(8,124)
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)
Cumulative effect of changes in accounting principles | Accounting Standards Update 2014-09 [Member]													$ 0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	18,912		18,912
Other comprehensive income, net of taxes	5,392				5,392
Dividend Reinvestment and Stock Purchase Plan (in shares)		25,629
Dividend Reinvestment and Stock Purchase Plan	446	$ 446
Exercise of stock options (in shares)		3,374
Exercise of stock options	41	$ 41
Treasury Stock, Shares, Acquired		400,000
Payments for Repurchase of Common Stock	6,834			6,834
Compensation expense relating to restricted stock (in shares)		12,504
Compensation expense relating to restricted stock	134	$ 134
Common stock dividends, $0.69 per share	(9,028)		(9,028)
Balance (in shares) at Dec. 31, 2019		12,936,783
Balance at end of year at Dec. 31, 2019	$ 228,048	$ 141,791	$ 104,431	$ (18,847)	$ 673