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			12 Months Ended
	Nov. 30, 2020	Jul. 31, 2020	Apr. 30, 2020	Feb. 29, 2020	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Earnings Per Share [Abstract]
Net Income (loss) attributable to FedNat holding company shareholders					$ (78,158)	$ 1,011	$ 14,928
Basic (in shares)					13,846	12,977	12,775
Net income (loss) per share - basic (in dollars per share)					$ (5.64)	$ 0.08	$ 1.17
Dilutive effect of stock compensation plans					0	46	92
Diluted (in shares)					13,846	13,023	12,867
Net income per share - diluted (in dollars per share)					$ (5.64)	$ 0.08	$ 1.16
Dividends declared per share of common stock (in dollars per share)	$ 0.09	$ 0.09	$ 0.09	$ 0.09	$ 0.36	$ 0.33	$ 0.24