ORGANIZATION, CONSOLIDATION AND BASIS OF PRESENTATION - Balance Sheet Schedule of Accounting Adjustments and Error Corrections (Details) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Debt securities, available for sale, at fair value	$ 423,238	$ 374,756
Debt securities, held-to-maturity, at amortized cost	5,349	5,551
Equity securities, available-for-sale, at fair value (cost of $14,085 and $24,163, respectively)	15,434	29,375
Total investments	444,021	409,682
Cash and cash equivalents	86,228	74,593	$ 53,038	$ 40,157
Prepaid reinsurance premiums	135,492	156,932
Premiums receivable, net	46,393	54,854
Reinsurance recoverable	124,601	47,863
Deferred acquisition costs	40,893	41,892
Income taxes receivable	9,510	13,871
Property and equipment, net	4,025	4,194
Other assets	13,403	11,509
Assets	904,873	815,390
Unfavorable loss and LAE reserve	230,515	158,110	97,706	78,330
Unearned premiums	294,423	294,022
Reinsurance payable	71,944	79,154
Debt	49,251	4,909
Deferred revenue	6,222	6,834
Deferred tax liabilities, net		253
Deferred tax liabilities, net	0	253
Other liabilities	25,059	37,643
Total liabilities	677,414	580,925
Preferred stock, $0.01 par value: 1,000,000 shares authorized	0	0
Common stock, $0.01 par value: 25,000,000 shares authorized; 12,988,247 and 13,473,120 shares issued and outstanding, respectively	130	134
Additional paid-in capital	139,728	136,779
Accumulated other comprehensive income	1,770	1,941
Retained Earnings	70,009	76,884
Total shareholders' equity attributable Federated National Holding Company shareholders	211,637	215,738
Non-controlling interest	15,822	18,727
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest	227,459	234,465	$ 246,157	189,561
Liabilities and Equity	$ 904,873	815,390
As Reported [Member]
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Debt securities, available for sale, at fair value		374,756
Debt securities, held-to-maturity, at amortized cost		5,551
Equity securities, available-for-sale, at fair value (cost of $14,085 and $24,163, respectively)		29,375
Total investments		409,682
Cash and cash equivalents		74,593
Prepaid reinsurance premiums		156,932
Premiums receivable, net		54,854
Reinsurance recoverable		48,530
Deferred acquisition costs		38,962
Income taxes receivable		13,871
Property and equipment, net		4,194
Other assets		11,509
Assets		813,127
Unfavorable loss and LAE reserve		158,110
Unearned premiums		294,022
Reinsurance payable		79,154
Debt		4,909
Deferred revenue		0
Deferred tax liabilities, net		1,433
Other liabilities		37,643
Total liabilities		575,271
Preferred stock, $0.01 par value: 1,000,000 shares authorized		0
Common stock, $0.01 par value: 25,000,000 shares authorized; 12,988,247 and 13,473,120 shares issued and outstanding, respectively		134
Additional paid-in capital		136,779
Accumulated other comprehensive income		1,941
Retained Earnings		80,275
Total shareholders' equity attributable Federated National Holding Company shareholders		219,129
Non-controlling interest		18,727
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest		237,856
Liabilities and Equity		813,127
Adjustments [Member]
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Debt securities, available for sale, at fair value		0
Debt securities, held-to-maturity, at amortized cost		0
Equity securities, available-for-sale, at fair value (cost of $14,085 and $24,163, respectively)		0
Total investments		0
Cash and cash equivalents		0
Prepaid reinsurance premiums		0
Premiums receivable, net		0
Reinsurance recoverable		(667)
Deferred acquisition costs		2,930
Income taxes receivable		0
Property and equipment, net		0
Other assets		0
Assets		2,263
Unfavorable loss and LAE reserve		0
Unearned premiums		0
Reinsurance payable		0
Debt		0
Deferred revenue		6,834
Deferred tax liabilities, net		(1,180)
Other liabilities		0
Total liabilities		5,654
Preferred stock, $0.01 par value: 1,000,000 shares authorized		0
Common stock, $0.01 par value: 25,000,000 shares authorized; 12,988,247 and 13,473,120 shares issued and outstanding, respectively		0
Additional paid-in capital		0
Accumulated other comprehensive income		0
Retained Earnings		(3,391)
Total shareholders' equity attributable Federated National Holding Company shareholders		(3,391)
Non-controlling interest		0
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest		(3,391)
Liabilities and Equity		$ 2,263
Adjustments for Direct Written Policy Fees and Other Fee Income [Member]
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Retained Earnings				54,405
Adjustments for Direct Written Policy Fees and Other Fee Income [Member] | As Reported [Member]
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Retained Earnings				57,423
Adjustments for Direct Written Policy Fees and Other Fee Income [Member] | Adjustments [Member]
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Retained Earnings				$ (3,018)