Schedule II - Condensed Financial Information of Registrant - Condensed Statements of Earnings (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Revenues:
Net investment income	$ 11,786	$ 15,901	$ 12,460
Net realized and unrealized investment gains (losses)	18,032	7,084	(4,144)
Total revenues	431,863	414,961	396,093
Costs and expenses [Abstract]
General and administrative expenses	23,420	23,203	22,183
Interest expense	7,661	10,776	4,177
Total costs and expenses	543,517	414,248	375,885
Income (loss) before income taxes	(111,654)	713	20,208
Income tax expense (benefit)	(33,496)	(298)	5,498
Net income (loss)	(78,158)	1,011	14,710
Net income (loss) attributable to non-controlling interest	0	0	(218)
Net income (loss) attributable to FedNat Holding Company shareholders	(78,158)	1,011	14,928
Parent Company
Revenues:
Management fees	2,660	2,160	2,608
Interest from subsidiaries	1,410	107	0
Net investment income	477	1,757	843
Net realized and unrealized investment gains (losses)	972	448	(765)
Equity in income (loss) of consolidated subsidiaries	(94,363)	20,909	30,895
Total revenues	(88,844)	25,381	33,581
Costs and expenses [Abstract]
General and administrative expenses	15,149	13,892	9,296
Interest expense	7,661	10,776	4,077
Total costs and expenses	22,810	24,668	13,373
Income (loss) before income taxes	(111,654)	713	20,208
Income tax expense (benefit)	(33,496)	(298)	5,498
Net income (loss)	(78,158)	1,011	14,710
Net income (loss) attributable to non-controlling interest	0	0	(218)
Net income (loss) attributable to FedNat Holding Company shareholders	$ (78,158)	$ 1,011	$ 14,928