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
	Jun. 01, 2018	Feb. 28, 2018	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Earnings Per Share [Abstract]
Net income (loss) attributable to FedNat Holding Company shareholders			$ 7,950	$ (4,724)	$ 24,233	$ 1,693
Weighted average number of common shares outstanding - basic			12,749	13,135	12,775	13,211
Net (loss) income per share - basic (in dollars per share)			$ 0.62	$ (0.36)	$ 1.90	$ 0.13
Dilutive effect of stock compensation plans			121	0	91	91
Weighted average number of common shares outstanding - diluted			12,870	13,135	12,866	13,302
Net (loss) income per share - diluted (in dollars per share)			$ 0.62	$ (0.36)	$ 1.88	$ 0.13
Dividends declared per share (in dollars per share)	$ 0.08	$ 0.08	$ 0	$ 0.08	$ 0.16	$ 0.24