XML 25 R1.htm IDEA: XBRL DOCUMENT v3.21.1
Document and Entity Information - USD ($)
 12 Months Ended
Dec. 31, 2020
Mar. 25, 2021
Jun. 30, 2020
Cover [Abstract]      
Document Type 10-K    
Document Annual Report true    
Document Period End Date Dec. 31, 2020    
Document Transition Report false    
Entity File Number 000-55983    
Entity Registrant Name Meridian Corp    
Entity Incorporation, State or Country Code PA    
Entity Tax Identification Number 83-1561918    
Entity Address, Address Line One 9 Old Lincoln Highway    
Entity Address, City or Town Malvern    
Entity Address, State or Province PA    
Entity Address, Postal Zip Code 19355    
City Area Code 484    
Local Phone Number 568-5000    
Title of 12(b) Security Common Stock, par value $1 per share    
Trading Symbol MRBK    
Security Exchange Name NASDAQ    
Entity Well-known Seasoned Issuer No    
Entity Voluntary Filers No    
Entity Current Reporting Status Yes    
Entity Interactive Data Current Yes    
Entity Filer Category Non-accelerated Filer    
Entity Small Business true    
Entity Emerging Growth Company true    
Entity Ex Transition Period false    
ICFR Auditor Attestation Flag true    
Entity Shell Company false    
Entity Public Float     $ 86,053,850
Entity Common Stock, Shares Outstanding   6,167,695  
Entity Central Index Key 0001750735    
Amendment Flag false    
Document Fiscal Year Focus 2020    
Current Fiscal Year End Date --12-31    
Document Fiscal Period Focus FY