Consolidated Statements of Changes in Shareholders' Equity - USD ($) $ in Thousands	Total	Old Line Bancshares, Inc. [Member]	Cumulative Effect, Period of Adoption, Adjustment [Member]	Preferred Stock [Member]	Common Stock	Common Stock Old Line Bancshares, Inc. [Member]	Capital Surplus [Member]	Capital Surplus [Member] Old Line Bancshares, Inc. [Member]	Retained Earnings [Member]	Retained Earnings [Member] Cumulative Effect, Period of Adoption, Adjustment [Member]	Treasury Stock [Member]	Accumulated Other Comprehensive Gain (Loss) [Member]	Deferred Benefits for Directors [Member]
Beginning Balance at Dec. 31, 2018	$ 1,978,827				$ 113,758		$ 1,166,701		$ 737,581		$ (274)	$ (37,871)	$ (1,068)
Beginning 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						13,351,837
Treasury shares acquired	(10,298)						181				(10,479)
Treasury shares acquired, shares					(281,365)
Stock options exercised	159				$ 8						151
Stock options exercised, shares					7,375
Restricted stock granted					$ 246		(1,385)				1,139
Restricted stock granted, shares					148,447
Stock compensation expense	5,321						5,321
Deferred benefits for directors-net	(208)						28						(236)
Ending Balance at Dec. 31, 2019	2,593,921		$ (26,591)		$ 141,827		1,636,966		824,694	$ (26,591)	(9,463)	1,201	(1,304)
Ending Balance, shares at Dec. 31, 2019					67,824,428
Net income	122,044								122,044
Other comprehensive income (loss)	30,158											30,158
Comprehensive income	152,202
Common dividends declared	(85,815)								(85,815)
Preferred dividends declared	$ (2,644)								(2,644)
Accounting Standards Update [Extensible List]	ASU 2016-13 [Member]
Issuance of preferred stock, net of issuance costs	$ 144,484			$ 144,484
Treasury shares acquired	(25,296)						118				(25,414)
Treasury shares acquired, shares					(813,108)
Stock options exercised	976				$ 7		(1,206)				2,175
Stock options exercised, shares					61,623
Restricted stock granted							(6,753)				6,753
Restricted stock granted, shares					181,763
Stock compensation expense	5,653						5,653
Deferred benefits for directors-net	(153)						37						(190)
Ending Balance at Dec. 31, 2020	2,756,737			144,484	$ 141,834		1,634,815		831,688		(25,949)	31,359	(1,494)
Ending Balance, shares at Dec. 31, 2020					67,254,706
Net income	242,260								242,260
Other comprehensive income (loss)	(36,479)											(36,479)
Comprehensive income	205,781
Common dividends declared	(85,667)								(85,667)
Preferred dividends declared	(10,125)								(10,125)
Stock issued for dividend reinvestment									(391)		391
Stock issued for dividend reinvestment, shares					11,720
Treasury shares acquired	(182,977)						194				(183,171)
Treasury shares acquired, shares					(5,218,275)
Stock options exercised	$ 3,096						(1,388)				4,484
Stock options exercised, shares	130,273				130,273
Restricted stock granted							(4,486)				4,486
Restricted stock granted, shares					128,821
Stock compensation expense	$ 6,475						6,475
Deferred benefits for directors-net	(154)						32						(186)
Ending Balance at Dec. 31, 2021	$ 2,693,166			$ 144,484	$ 141,834		$ 1,635,642		$ 977,765		$ (199,759)	$ (5,120)	$ (1,680)
Ending Balance, shares at Dec. 31, 2021					62,307,245