Consolidated Statements of Changes in Shareholders' Equity - USD ($) $ in Thousands	Total	Farmers Capital Bank Corporation [Member]	First Sentry Bancshares, Inc. [Member]	Old Line Bancshares, Inc. [Member]	Common Stock [Member]	Common Stock [Member] Farmers Capital Bank Corporation [Member]	Common Stock [Member] First Sentry Bancshares, Inc. [Member]	Common Stock [Member] Old Line Bancshares, Inc. [Member]	Capital Surplus [Member]	Capital Surplus [Member] Farmers Capital Bank Corporation [Member]	Capital Surplus [Member] First Sentry Bancshares, Inc. [Member]	Capital Surplus [Member] Old Line Bancshares, Inc. [Member]	Retained Earnings [Member]	Treasury Stock [Member]	Treasury Stock [Member] First Sentry Bancshares, Inc. [Member]	Accumulated Other Comprehensive Gain (Loss) [Member]	Deferred Benefits for Directors [Member]
Beginning Balance at Dec. 31, 2016	$ 1,341,408				$ 91,524				$ 680,507				$ 597,071			$ (27,126)	$ (568)
Beginning Balance, shares at Dec. 31, 2016					43,931,715
Net income	94,482												94,482
Other comprehensive income (loss)	1,212															1,212
Comprehensive income	95,694
Common dividends declared	(45,777)												(45,777)
Adoption of accounting standard													5,581			(5,581)
Stock options exercised	1,529				$ 78				794					$ 657
Stock options exercised, shares					54,584
Restricted stock granted					$ 154				(154)
Restricted stock granted, shares					74,023
Treasury shares acquired	(489)								168					(657)
Treasury shares acquired, shares					(17,078)
Stock compensation expense	2,956								2,956
Deferred benefits for directors- net									459								(459)
Ending Balance at Dec. 31, 2017	1,395,321				$ 91,756				684,730				651,357			(31,495)	(1,027)
Ending Balance, shares at Dec. 31, 2017					44,043,244
Net income	143,112												143,112
Other comprehensive income (loss)	(5,313)															(5,313)
Comprehensive income	137,799
Common dividends declared	(57,951)												(57,951)
Adoption of accounting standard													1,063			(1,063)
Shares issued for acquisition		$ 107,347	$ 391,267			$ 5,206	$ 16,487			$ 102,141	$ 374,464				$ 316
Shares issued for acquisition, shares						2,498,761	7,920,387
Stock options exercised	1,849				$ 104				1,346					399
Stock options exercised, shares					58,763
Restricted stock granted					$ 205				(205)
Restricted stock granted, shares					98,301
Treasury shares acquired	(697)								292					(989)
Treasury shares acquired, shares					(21,322)
Stock compensation expense	4,361								4,361
Deferred benefits for directors- net	(469)								(428)								(41)
Ending Balance at Dec. 31, 2018	1,978,827				$ 113,758				1,166,701				737,581	(274)		(37,871)	(1,068)
Ending Balance, shares at Dec. 31, 2018					54,598,134
Net income	158,873												158,873
Other comprehensive income (loss)	39,072															39,072
Comprehensive income	197,945
Common dividends declared	$ (71,760)												(71,760)
Shares issued for acquisition				$ 493,935				$ 27,815				$ 466,120
Shares issued for acquisition, shares	220,615							13,351,837
Stock options exercised	$ 159				$ 8									151
Stock options exercised, shares	7,375				7,375
Restricted stock granted					$ 246				(1,385)					1,139
Restricted stock granted, shares					148,447
Treasury shares acquired	$ (10,298)								181					(10,479)
Treasury shares acquired, shares					(281,365)
Stock compensation expense	5,321								5,321
Deferred benefits for directors- net	(208)								28								(236)
Ending Balance at Dec. 31, 2019	$ 2,593,921				$ 141,827				$ 1,636,966				$ 824,694	$ (9,463)		$ 1,201	$ (1,304)
Ending Balance, shares at Dec. 31, 2019					67,824,428