Document and Entity Information
Feb. 13, 2020
Document and Entity Information  
Document Type 8-K
Document Period End Date Feb. 13, 2020
Entity Registrant Name 1st Source Corp
Entity Incorporation, State or Country Code IN
Entity File Number 0-6233
Entity Tax Identification Number 35-1068133
Entity Address, Address Line One 100 North Michigan Street
Entity Address, City or Town South Bend
Entity Address, State or Province IN
Entity Address, Postal Zip Code 46601
City Area Code 574
Local Phone Number 235-2000
Written Communications false
Soliciting Material false
Pre-commencement Tender Offer false
Pre-commencement Issuer Tender Offer false
Title of 12(b) Security Common Stock - without par value
Trading Symbol SRCE
Security Exchange Name NASDAQ
Entity Emerging Growth Company false
Amendment Flag false
Entity Central Index Key 0000034782