Document And Entity Information - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2016	Mar. 08, 2017	Jun. 30, 2016
Document Information [Line Items]
Entity Registrant Name	Bear State Financial, Inc.
Entity Central Index Key	0001006424
Trading Symbol	bsf
Current Fiscal Year End Date	--12-31
Entity Filer Category	Accelerated Filer
Entity Current Reporting Status	Yes
Entity Voluntary Filers	No
Entity Well-known Seasoned Issuer	No
Entity Common Stock, Shares Outstanding (in shares)		37,689,939
Entity Public Float			$ 167.5
Document Type	10-K
Document Period End Date	Dec. 31, 2016
Document Fiscal Year Focus	2016
Document Fiscal Period Focus	FY
Amendment Flag	false