CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Thousands, $ in Thousands		1 Months Ended			3 Months Ended								6 Months Ended	9 Months Ended	12 Months Ended
	Mar. 01, 2017	Nov. 30, 2017	Sep. 30, 2017	Jun. 30, 2017	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Jun. 30, 2017	Sep. 30, 2017	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Revenue:
Net premiums earned					$ 87,503	$ 80,764	$ 83,554	$ 81,660	$ 76,922	$ 69,405	$ 60,045	$ 54,997	$ 165,214	$ 245,978	$ 333,481	$ 261,369	$ 213,020
Net investment income						2,603	2,560	2,318					4,878	7,481	10,254	9,063	7,226
Net realized investment gains						6,101	2,648	(105)					2,543	8,644	8,548	3,045	3,616
Direct written policy fees						4,098	4,807	4,712					9,519	13,617	17,173	16,619	9,740
Other income						5,131	4,590	4,469					9,059	14,190	22,206	17,429	9,869
Total revenue					101,752	98,697	98,159	93,054	89,971	81,758	70,786	65,010	191,213	289,910	391,662	307,525	243,471
Costs and expenses:
Losses and loss adjustment expenses						75,367	56,417	56,899					113,316	188,683	247,557	197,810	112,710
Commissions and other underwriting expenses						28,386	30,929	27,568					58,497	86,883	114,867	90,378	52,862
General and administrative expenses						5,042	5,076	4,619					9,695	14,737	19,963	17,186	14,698
Interest expense						81	82	84					166	247	348	348	256
Total costs and expenses					92,185	108,876	92,504	89,170	103,948	78,914	71,090	51,770	181,674	290,550	382,735	305,722	180,526
Income before income taxes						(10,179)	5,655	3,884					9,539	(640)	8,927	1,803	62,945
Income taxes						(3,781)	1,988	1,435					3,423	(358)	3,585	542	24,089
Net income						(6,398)	3,667	2,449					6,116	(282)	5,342	1,261	38,856
Net (loss) income attributable to non-controlling interest						(1,674)	(328)	27					(301)	(1,975)	(2,647)	246	(445)
Net income attributable to Federated National Holding Company shareholders					$ 6,296	$ (4,724)	$ 3,995	$ 2,422	$ (8,793)	$ 2,099	$ (405)	$ 8,114	$ 6,417	$ 1,693	$ 7,989	$ 1,015	$ 39,301
Net income per share attributable to Federated National Holding Company shareholders:
Basic (in dollars per share)					$ 0.48	$ (0.36)	$ 0.30	$ 0.18	$ (0.65)	$ 0.15	$ (0.03)	$ 0.59	$ 0.48	$ 0.13	$ 0.61	$ 0.07	$ 2.86
Diluted (in dollars per share)						$ (0.36)	$ 0.30	$ 0.18					$ 0.48	$ 0.13	$ 0.60	$ 0.07	$ 2.81
Weighted average number of shares of common stock outstanding:
Basic (in shares)						13,135	13,171	13,432					13,305	13,211	13,170	13,758	13,729
Diluted (in shares)						13,135	13,256	13,559					13,405	13,302	13,250	13,922	13,997
Dividends declared per share of common stock (in dollars per share)	$ 0.08	$ 0.08	$ 0.08	$ 0.08		$ 0.08	$ 0.08	$ 0.08					$ 0.16	$ 0.24	$ 0.32	$ 0.27	$ 0.18