Document and Entity Information - shares	3 Months Ended
	Mar. 31, 2019	May 09, 2019
Document Document And Entity Information [Abstract]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Mar. 31, 2019
Document Fiscal Year Focus	2019
Document Fiscal Period Focus	Q1
Trading Symbol	mfsf
Entity Registrant Name	MUTUALFIRST FINANCIAL INC
Entity Central Index Key	0001094810
Current Fiscal Year End Date	--12-31
Entity Filer Category	Accelerated Filer
Entity Common Stock, Shares Outstanding		8,617,362