EARNINGS PER SHARE (Schedule of Calculation of Basic and Diluted Net Income Per Common Share) (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	1 Months Ended			3 Months Ended		9 Months Ended
	Jul. 31, 2020	Apr. 30, 2020	Feb. 29, 2020	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Earnings Per Share [Abstract]
Net income (loss) attributable to FedNat Holding Company shareholders				$ (20,745)	$ 4,659	$ (40,091)	$ 7,904
Weighted average number of common shares outstanding - basic				13,708	12,854	13,890	12,831
Net (loss) income per share - basic (in dollars per share)				$ (1.51)	$ 0.36	$ (2.89)	$ 0.62
Dilutive effect of stock compensation plans				0	43	0	49
Weighted average number of common shares outstanding - diluted				13,708	12,897	13,890	12,880
Net (loss) income per share - diluted (in dollars per share)				$ (1.51)	$ 0.36	$ (2.89)	$ 0.61
Dividends declared per share (in dollars per share)	$ 0.09	$ 0.09	$ 0.09	$ 0.09	$ 0.08	$ 0.27	$ 0.24