Consolidated Statements of Changes in Shareholders' Equity - USD ($) $ in Thousands	Total	Cumulative Effect of Change in Accounting Principles	Balances, January 1, 2020	Common Stock	Common Stock Balances, January 1, 2020	Additional Paid-in Capital	Additional Paid-in Capital Balances, January 1, 2020	Retained Earnings	Retained Earnings Cumulative Effect of Change in Accounting Principles	Retained Earnings Balances, January 1, 2020	Accumulated Other Comprehensive Income (Loss)	Accumulated Other Comprehensive Income (Loss) Balances, January 1, 2020
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	59,222							59,222
Other Comprehensive Income (Loss)	22,203										22,203
Cash Dividends	(17,556)							(17,556)
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)				39,956
Restricted Share Grants	1,287			$ 40		1,247
Ending Balances (in shares) at Dec. 31, 2019				26,671,368	26,671,368
Ending Balance at Dec. 31, 2019	573,820	$ (6,717)	$ 567,103	$ 26,671	$ 26,671	278,954	$ 278,954	253,090	$ (6,717)	$ 246,373	15,105	$ 15,105
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income	62,210							62,210
Other Comprehensive Income (Loss)	20,270										20,270
Cash Dividends	(20,136)							(20,136)
Issuance of Common Stock for:
Restricted Share Grants (in shares)				52,701
Restricted Share Grants	1,051			$ 53		998
Stock Repurchase (in shares)				(221,912)
Stock Repurchase	(5,789)			$ (222)		(5,567)
Ending Balances (in shares) at Dec. 31, 2020				26,502,157
Ending Balance at Dec. 31, 2020	624,709			$ 26,502		274,385		288,447			35,375
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income	84,137							84,137
Other Comprehensive Income (Loss)	(19,891)										(19,891)
Cash Dividends	(22,220)							(22,220)
Issuance of Common Stock for:
Restricted Share Grants (in shares)				51,351
Restricted Share Grants	1,724			$ 52		1,672
Ending Balances (in shares) at Dec. 31, 2021				26,553,508
Ending Balance at Dec. 31, 2021	$ 668,459			$ 26,554		$ 276,057		$ 350,364			$ 15,484