CONSOLIDATED STATEMENTS OF CHANGES IN SHAREHOLDERS' EQUITY - USD ($) $ in Thousands	Total	Common Stock	Additional Paid-in Capital	Retained Earnings	Accumulated Other Comprehensive Income (Loss)
Beginning Balances (in shares) at Dec. 31, 2017		22,934,403
Beginning Balance at Dec. 31, 2017	$ 364,571	$ 22,934	$ 165,288	$ 178,969	$ (2,620)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
NET INCOME	11,813			11,813
Other Comprehensive Income (Loss)	(9,218)				(9,218)
Cash Dividends	(3,440)			(3,440)
Issuance of Common Stock for:
Restricted Share Grants (in shares)		34,410
Restricted Share Grants	279	$ 35	244
Ending Balances (in shares) at Mar. 31, 2018		22,968,813
Ending Balance at Mar. 31, 2018	364,005	$ 22,969	165,532	187,342	(11,838)
Beginning Balances (in shares) at Dec. 31, 2017		22,934,403
Beginning Balance at Dec. 31, 2017	364,571	$ 22,934	165,288	178,969	(2,620)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
NET INCOME	35,549
Other Comprehensive Income (Loss)	(14,640)
Ending Balances (in shares) at Sep. 30, 2018		22,968,078
Ending Balance at Sep. 30, 2018	376,123	$ 22,968	166,227	204,188	(17,260)
Beginning Balances (in shares) at Mar. 31, 2018		22,968,813
Beginning Balance at Mar. 31, 2018	364,005	$ 22,969	165,532	187,342	(11,838)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
NET INCOME	11,097			11,097
Other Comprehensive Income (Loss)	(1,501)				(1,501)
Cash Dividends	(3,445)			(3,445)
Issuance of Common Stock for:
Restricted Share Grants (in shares)		(915)
Restricted Share Grants	384	$ (1)	385
Ending Balances (in shares) at Jun. 30, 2018		22,967,898
Ending Balance at Jun. 30, 2018	370,540	$ 22,968	165,917	194,994	(13,339)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
NET INCOME	12,639			12,639
Other Comprehensive Income (Loss)	(3,921)				(3,921)
Cash Dividends	(3,445)			(3,445)
Issuance of Common Stock for:
Restricted Share Grants (in shares)		180
Restricted Share Grants	310		310
Ending Balances (in shares) at Sep. 30, 2018		22,968,078
Ending Balance at Sep. 30, 2018	376,123	$ 22,968	166,227	204,188	(17,260)
Beginning Balances (in shares) at Dec. 31, 2018		24,967,458
Beginning Balance at Dec. 31, 2018	458,640	$ 24,967	229,347	211,424	(7,098)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
NET INCOME	15,067			15,067
Other Comprehensive Income (Loss)	9,414				9,414
Cash Dividends	(4,245)			(4,245)
Issuance of Common Stock for:
Restricted Share Grants (in shares)		24,780
Restricted Share Grants	311	$ 25	286
Ending Balances (in shares) at Mar. 31, 2019		24,992,238
Ending Balance at Mar. 31, 2019	479,187	$ 24,992	229,633	222,246	2,316
Beginning Balances (in shares) at Dec. 31, 2018		24,967,458
Beginning Balance at Dec. 31, 2018	458,640	$ 24,967	229,347	211,424	(7,098)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
NET INCOME	43,402
Other Comprehensive Income (Loss)	22,954
Ending Balances (in shares) at Sep. 30, 2019		26,662,078
Ending Balance at Sep. 30, 2019	562,927	$ 26,662	278,608	241,801	15,856
Beginning Balances (in shares) at Mar. 31, 2019		24,992,238
Beginning Balance at Mar. 31, 2019	479,187	$ 24,992	229,633	222,246	2,316
Increase (Decrease) in Stockholders' Equity [Roll Forward]
NET INCOME	15,271			15,271
Other Comprehensive Income (Loss)	8,891				8,891
Cash Dividends	(4,248)			(4,248)
Issuance of Common Stock for:
Restricted Share Grants	310		310
Ending Balances (in shares) at Jun. 30, 2019		24,992,238
Ending Balance at Jun. 30, 2019	499,411	$ 24,992	229,943	233,269	11,207
Increase (Decrease) in Stockholders' Equity [Roll Forward]
NET INCOME	13,064			13,064
Other Comprehensive Income (Loss)	4,649				4,649
Cash Dividends	(4,532)			(4,532)
Issuance of Common Stock for:
Acquisition of Citizens First Corporation (in shares)		1,663,954
Acquisition of Citizens First Corporation	50,024	$ 1,664	48,360
Restricted Share Grants (in shares)		5,886
Restricted Share Grants	311	$ 6	305
Ending Balances (in shares) at Sep. 30, 2019		26,662,078
Ending Balance at Sep. 30, 2019	$ 562,927	$ 26,662	$ 278,608	$ 241,801	$ 15,856