CONSOLIDATED CONDENSED STATEMENTS OF SHAREHOLDERS' EQUITY - USD ($) $ in Thousands	Total	Common Stock [Member]	Retained Earnings [Member]	Treasury Shares [Member]	Accumulated Other Comprehensive Income [Member]	Calculated under Revenue Guidance in Effect before Topic 606 [Member] Common Stock [Member]	Calculated under Revenue Guidance in Effect before Topic 606 [Member] Retained Earnings [Member]	Calculated under Revenue Guidance in Effect before Topic 606 [Member] Treasury Shares [Member]	Calculated under Revenue Guidance in Effect before Topic 606 [Member] Accumulated Other Comprehensive Income [Member]	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 [Member]	Difference between Revenue Guidance in Effect before and after Topic 606 [Member] Accumulated Other Comprehensive Income [Member]	Columbus First Bancorp, Inc. [Member]	Columbus First Bancorp, Inc. [Member] Common Stock [Member]
Balance Beginning (in shares) at Dec. 31, 2017		10,023,059				10,023,059
Balance beginning at Dec. 31, 2017	$ 150,271	$ 76,977	$ 87,826	$ (11,665)	$ (2,867)	$ 76,977	$ 87,301	$ (11,665)	$ (2,342)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	9,652		9,652
Other comprehensive income, net of taxes	(4,566)				(4,566)
Dividend Reinvestment and Stock Purchase Plan (in shares)		15,592
Dividend Reinvestment and Stock Purchase Plan	299	$ 299
Stock Issued During Period, Shares, Acquisitions														3,253,060
Exercise of stock options (in shares)		2,631
Exercise of stock options	33	$ 33
Stock Issued During Period, Value, Acquisitions													$ 63,598	$ 63,598
Compensation expense relating to restricted stock (in shares)		10,634
Adjustments to Additional Paid in Capital, Share-based Compensation, Restricted Stock Unit or Restricted Stock Award, Requisite Service Period Recognition	89	$ 89
Common stock dividends, $0.48 per share	(5,861)		(5,861)
Cumulative effect of changes in accounting principles | Accounting Standards Update 2014-09 [Member]										$ (525)	$ 525	$ (525)
Balance Ending (in shares) at Sep. 30, 2018		13,304,976
Balance ending at Sep. 30, 2018	213,515	$ 140,996	91,617	(11,665)	(7,433)				(7,433)
Balance Beginning (in shares) at Jun. 30, 2018		13,299,235
Balance beginning at Jun. 30, 2018	212,366	$ 140,870	89,544	(11,665)	(6,383)				(6,383)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	4,201		4,201
Other comprehensive income, net of taxes	(1,050)				(1,050)
Dividend Reinvestment and Stock Purchase Plan (in shares)		5,741
Dividend Reinvestment and Stock Purchase Plan	108	$ 108
Compensation expense relating to restricted stock (in shares)		0
Adjustments to Additional Paid in Capital, Share-based Compensation, Restricted Stock Unit or Restricted Stock Award, Requisite Service Period Recognition	18	$ 18
Common stock dividends, $0.48 per share	(2,128)		(2,128)
Cumulative effect of changes in accounting principles | Accounting Standards Update 2014-09 [Member]										$ 0
Balance Ending (in shares) at Sep. 30, 2018		13,304,976
Balance ending at Sep. 30, 2018	213,515	$ 140,996	91,617	(11,665)	(7,433)				(7,433)
Balance Beginning (in shares) at Dec. 31, 2018		13,295,276
Balance beginning at Dec. 31, 2018	218,985	$ 141,170	94,547	(12,013)	(4,719)				(4,719)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	14,082		14,082
Other comprehensive income, net of taxes	5,511				5,511
Dividend Reinvestment and Stock Purchase Plan (in shares)		19,683
Dividend Reinvestment and Stock Purchase Plan	336	$ 336
Treasury Stock, Shares, Acquired		(400,000)
Treasury Stock, Value, Acquired, Cost Method	(6,834)			(6,834)
Compensation expense relating to restricted stock (in shares)		12,504
Adjustments to Additional Paid in Capital, Share-based Compensation, Restricted Stock Unit or Restricted Stock Award, Requisite Service Period Recognition	112	$ 112
Common stock dividends, $0.48 per share	(6,700)		(6,700)
Balance Ending (in shares) at Sep. 30, 2019		12,927,463
Balance ending at Sep. 30, 2019	225,492	$ 141,618	101,929	(18,847)	792
Balance Beginning (in shares) at Jun. 30, 2019		12,978,554
Balance beginning at Jun. 30, 2019	222,972	$ 141,479	99,400	(17,854)	(53)				$ (53)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	4,727		4,727
Other comprehensive income, net of taxes	845				845
Dividend Reinvestment and Stock Purchase Plan (in shares)		6,824
Dividend Reinvestment and Stock Purchase Plan	118	$ 118
Treasury Stock, Shares, Acquired		(57,915)
Treasury Stock, Value, Acquired, Cost Method	(993)			(993)
Compensation expense relating to restricted stock (in shares)		0
Adjustments to Additional Paid in Capital, Share-based Compensation, Restricted Stock Unit or Restricted Stock Award, Requisite Service Period Recognition	21	$ 21
Common stock dividends, $0.48 per share	(2,198)		(2,198)
Balance Ending (in shares) at Sep. 30, 2019		12,927,463
Balance ending at Sep. 30, 2019	$ 225,492	$ 141,618	$ 101,929	$ (18,847)	$ 792