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								12 Months Ended
	Nov. 30, 2019	Jul. 31, 2019	May 31, 2019	Jan. 31, 2019	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Earnings Per Share [Abstract]
Net income (loss) attributable to FedNat Holding Company shareholders					$ (6,893)	$ 4,659	$ 7,110	$ (3,865)	$ (9,305)	$ 7,950	$ 8,820	$ 7,463	$ 1,011	$ 14,928	$ 7,989
Basic (in shares)													12,977	12,775	13,170
Net income (loss) per share - basic (in dollars per share)					$ (0.51)	$ 0.36	$ 0.55	$ (0.30)	$ (0.73)	$ 0.62	$ 0.69	$ 0.58	$ 0.08	$ 1.17	$ 0.61
Dilutive effect of stock compensation plans													46	92	80
Diluted (in shares)													13,023	12,867	13,250
Net income per share - diluted (in dollars per share)													$ 0.08	$ 1.16	$ 0.60
Dividends declared per share of common stock (in dollars per share)	$ 0.09	$ 0.08	$ 0.08	$ 0.08									$ 0.33	$ 0.24	$ 0.32