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
	Mar. 31, 2022	Mar. 31, 2021
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Net income (loss) attributable to FedNat Holding Company shareholders	$ (43,914)	$ (19,381)
Basic (in shares)	17,462	14,395
Basic (in dollars per share)	$ (2.51)	$ (1.35)
Dilutive effect of convertible debt (in shares)	0	0
Dilutive effect of stock compensation plans (in shares)	0	0
Weighted average number of common shares outstanding - diluted	17,462	14,395
Net income (loss) per common share - diluted (in dollars per share)	$ (2.51)	$ (1.35)
Dividends per share (in dollars per share)	$ 0	$ 0
Weighted average number of shares excluded from computation of EPS because inclusion would have been antidilutive	3,500
Interest Expense
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Interest expense	$ 300