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	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Earnings Per Share [Abstract]
Net income (loss) attributable to FedNat Holding Company shareholders	$ (24,781)	$ (20,745)	$ (94,531)	$ (40,091)
Weighted average number of common shares outstanding - basic (in shares)	17,445	13,708	16,417	13,890
Net income (loss) per share - basic (in dollars per share)	$ (1.42)	$ (1.51)	$ (5.76)	$ (2.89)
Dilutive effect of convertible debt (in shares)	0	0	0	0
Dilutive effect of stock compensation plans (in shares)	0	0	0	0
Weighted average number of common shares outstanding - diluted (in shares)	17,445	13,708	16,417	13,890
Net income (loss) per common share - diluted (in dollars per share)	$ (1.42)	$ (1.51)	$ (5.76)	$ (2.89)
Dividends per share (in dollars per share)	$ 0	$ 0.09	$ 0	$ 0.27
Weighted average number of shares excluded from computation of EPS because inclusion would have been antidilutive	3,500		2,110