Document and Entity Information Document - USD ($)	12 Months Ended
	Dec. 31, 2017	Mar. 16, 2018	Jun. 30, 2017
Entity Information [Line Items]
Entity Registrant Name	KINGSWAY FINANCIAL SERVICES INC.
Entity Central Index Key	0001072627
Current Fiscal Year End Date	--12-31
Entity Filer Category	Accelerated Filer
Document Type	10-K
Document Period End Date	Dec. 31, 2017
Document Fiscal Year Focus	2017
Document Fiscal Period Focus	FY
Amendment Flag	false
Common Stock, Shares, Outstanding		23,660,855
Entity Well-known Seasoned Issuer	No
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Public Float			$ 85,076,504