Cover page - USD ($)	12 Months Ended
	Dec. 31, 2020	Mar. 05, 2021	Jun. 30, 2020
Cover [Abstract]
Document Type	10-K
Document Annual Report	true
Document Period End Date	Dec. 31, 2020
Current Fiscal Year End Date	--12-31
Document Transition Report	false
Entity File Number	000-25001
Entity Registrant Name	FedNat Holding Co
Entity Incorporation, State or Country Code	FL
Entity Tax Identification Number	65-0248866
Entity Address, Address Line One	14050 N.W. 14th Street
Entity Address, Address Line Two	Suite 180
Entity Address, City or Town	Sunrise
Entity Address, State or Province	FL
Entity Address, Postal Zip Code	33323
City Area Code	800
Local Phone Number	293-2532
Title of 12(b) Security	Common Stock, par value $0.01 per share
Trading Symbol	FNHC
Security Exchange Name	NASDAQ
Entity Well-known Seasoned Issuer	No
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
ICFR Auditor Attestation Flag	true
Entity Shell Company	false
Entity Public Float			$ 139,671,662
Entity Common Stock, Shares Outstanding		13,717,908
Entity Central Index Key	0001069996
Document Fiscal Period Focus	FY
Document Fiscal Year Focus	2020
Amendment Flag	false