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		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Earnings Per Share [Abstract]
Net income (loss) attributable to FedNat Holding Company shareholders	$ (50,369)	$ (21,479)	$ (69,750)	$ (19,346)
Weighted average number of common shares outstanding - basic (in shares)	17,411	13,714	15,901	13,981
Net income (loss) per share - basic (in dollars per share)	$ (2.89)	$ (1.57)	$ (4.39)	$ (1.38)
Dilutive effect of stock compensation plans (in shares)	0	0	0	0
Weighted average number of common shares outstanding - diluted (in shares)	17,411	13,714	15,901	13,981
Net income (loss) per common share - diluted (in dollars per share)	$ (2.89)	$ (1.57)	$ (4.39)	$ (1.38)
Dividends per share (in dollars per share)	$ 0	$ 0.09	$ 0	$ 0.18
Weighted average number of shares excluded from computation of EPS because inclusion would have been antidilutive	2,813		1,426