Quarterly report pursuant to Section 13 or 15(d)

Document And Entity Information

v3.20.2
Document And Entity Information - shares
Jun. 30, 2020
Jul. 27, 2020
Document Information [Line Items]    
Entity, Registrant Name SERVISFIRST BANCSHARES, INC.  
Current Fiscal Year End Date --12-31  
Document, Fiscal Period Focus Q2  
Document, Fiscal Year Focus 2020  
Document, Type 10-Q/A  
Document, Quarterly Report true  
Document, Period End Date Jun. 30, 2020  
Document, Transition Report false  
Entity, File Number 001-36452  
Entity, Incorporation, State or Country Code DE  
Entity, Tax Identification Number 26-0734029  
Entity, Address, Address Line One 2500 Woodcrest Place  
Entity, Address, City or Town Birmingham  
Entity, Address, State or Province AL  
Entity, Address, Postal Zip Code 35209  
City Area Code 205  
Local Phone Number 949-0302  
Title of 12(b) Security Common stock  
Trading Symbol SFBS  
Security Exchange Name NASDAQ  
Entity, Current Reporting Status Yes  
Entity, Interactive Data, Current Yes  
Entity, Filer Category Large Accelerated Filer  
Entity, Small Business false  
Entity, Emerging Growth Company false  
Entity, Shell Company false  
Entity, Common Stock Shares, Outstanding   53,882,358
Amendment Description ServisFirst Bancshares, Inc., a Delaware corporation, together with its subsidiaries, including ServisFirst Bank, the “Company”, which may also be referred to as “we”, “our”, “us”, ServisFirst Bancshares”, and “ServisFirst”, is filing this Amendment No. 1 to Quarterly Report on Form 10-Q/A (the “Amendment”) to our Quarterly Report on Form 10-Q for the quarterly period ended June 30, 2020, which was filed with the Securities and Exchange Commission on July 31, 2020 (the “Original Filing”). The Company is filing this Amendment solely for the purpose of correcting an error in Item 2 of its Form 10-Q for the quarterly period ended June 30, 2020 in the table setting forth capital ratios required by the FDIC and Alabama Banking Department.  Specifically, the Consolidated and ServisFirst Bank Tier 1 Capital to Average Assets Ratios and related amounts for the quarter ended June 30, 2020 have been revised to properly reflect the impact of Paycheck Protection Program loans on our average assets for purposes of calculating these ratios. There were no other changes to the Original Filing.  
Amendment Flag true  
Entity, Central Index Key 0001430723