CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Cash flow from operating activities:
Net income (loss)	$ (78,158)	$ 1,011	$ 14,710
Adjustments to reconcile net income to net cash provided by (used in) operating activities:
Net realized and unrealized investment (gains) losses	(18,032)	(7,084)	4,144
Impairment of intangibles	11,699	0	0
Loss (gain) on early extinguishment of debt	0	3,575	0
Amortization of investment premium or discount, net	3,740	916	1,546
Depreciation and amortization	1,904	1,477	1,385
Share-based compensation	1,580	2,176	2,367
Changes in operating assets and liabilities:
Prepaid reinsurance premiums	(132,613)	(11,803)	26,915
Premiums receivable, net	(9,381)	(8,654)	16,602
Reinsurance recoverable, net	(203,443)	9,412	(86,823)
Deferred acquisition costs and value of business acquired, net	30,731	(7,979)	1,457
Current and deferred income taxes, net	(32,835)	(3,723)	6,109
Deferred revenue	331	756	(1,637)
Loss and loss adjustment expense reserves	216,005	11,472	65,715
Unearned premiums	5,919	28,365	(12,431)
Reinsurance payable and funds withheld liabilities	100,360	14,797	(8,345)
Other	10,285	602	(1,444)
Net cash provided by (used in) operating activities	(91,908)	35,316	30,270
Cash flow from investing activities:
Proceeds from sales of equity securities	22,050	9,203	10,639
Proceeds from sales of debt securities	556,463	164,196	228,777
Purchases of equity securities	(4,727)	(6,565)	(13,542)
Purchases of debt securities	(580,876)	(228,132)	(337,776)
Maturities and redemptions of debt securities	86,814	43,925	92,744
Payment for acquisition, net of cash acquired	0	10,402	0
Purchases of property and equipment	(3,357)	(2,040)	(2,026)
Net cash provided by (used in) investing activities	76,367	(9,011)	(21,184)
Cash flow from financing activities:
Proceeds from issuance of long-term debt, net of issuance costs	0	98,390	0
Payment of long-term debt and prepayment penalties	0	(48,000)	(5,000)
Purchase of non-controlling interest	0	0	(16,685)
Purchases of FedNat Holding Company common stock	(10,418)	(3,449)	(5,061)
Issuance of common stock for share-based awards	42	1	39
Dividends paid	(5,077)	(4,309)	(4,184)
Net cash provided by (used in) financing activities	(15,453)	42,633	(30,891)
Net increase (decrease) in cash and cash equivalents	(30,994)	68,938	(21,805)
Cash and cash equivalents at beginning-of-period	133,361	64,423	86,228
Cash and cash equivalents at end-of-period	102,367	133,361	64,423
Supplemental disclosure of cash flow information:
Cash paid (received) during the period for income taxes	7,500	4,860	4,266
Cash paid (received) during the period for income taxes	(635)	3,504	(1,104)
Significant non-cash investing and financing transactions:
Right-of-use asset	(7,430)	(8,096)	0
Lease liability	$ 7,430	$ 8,096	$ 0