Schedule II - Condensed Financial Information of Registrant - Condensed Statements of Cash Flows (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Adjustments to reconcile net income to net cash provided by (used in) operating activities:
Depreciation and amortization	$ 1,916	$ 1,904	$ 1,477
Amortization of investment premium or discount, net	3,645	3,740	916
Loss (gain) on early extinguishment of debt	0	0	3,575
Share-based compensation	1,164	1,580	2,176
Changes in operating assets and liabilities [Abstract]
Current and deferred income taxes, net	5,016	(32,835)	(3,723)
Other	(14,197)	10,285	602
Net cash provided by (used in) operating activities	(191,171)	(91,908)	35,316
Cash flow from investing activities:
Payment for acquisition	0	0	10,402
Purchases of property and equipment	(1,836)	(3,357)	(2,040)
Net cash provided by (used in) investing activities	136,930	76,367	(9,011)
Cash flow from financing activities:
Proceeds from issuance of long-term debt, net of issuance costs	19,818	0	98,390
Payment of long-term debt and prepayment penalties	0	0	(48,000)
Issuance of common stock	15,571	0	0
Issuance of common stock for share-based awards	11	42	1
Purchases of FedNat Holding Company common stock	0	(10,418)	(3,449)
Dividends paid	0	(5,077)	(4,309)
Net cash provided by (used in) financing activities	35,400	(15,453)	42,633
Net increase (decrease) in cash and cash equivalents	(18,841)	(30,994)	68,938
Cash and cash equivalents at beginning-of-period	102,367	133,361	64,423
Cash and cash equivalents at end-of-period	83,526	102,367	133,361
Parent Company
Cash flow from operating activities:
Net income (loss)	(103,100)	(78,158)	1,011
Adjustments to reconcile net income to net cash provided by (used in) operating activities:
Net realized and unrealized investment (gains) losses	(506)	(972)	(448)
Depreciation and amortization	81,924	94,363	(20,909)
Amortization of investment premium or discount, net	555	430	369
Loss (gain) on early extinguishment of debt	0	0	3,575
Share-based compensation	581	790	1,050
Increase (Decrease) in Notes Receivable, Related Parties	1,515	1,410	107
Changes in operating assets and liabilities [Abstract]
Current and deferred income taxes, net	3,730	6,900	(5,379)
Due to subsidiaries	40,254	(21,891)	3,044
Other	755	4,974	1,105
Net cash provided by (used in) operating activities	22,678	5,026	(16,689)
Cash flow from investing activities:
Capital contributions to consolidated subsidiaries	(65,271)	(11,000)	0
Sales, maturities and redemptions of investments securities	8,458	31,300	11,276
Purchases of investment securities	(14,768)	(25,089)	(15,617)
Payment for acquisition	0	0	(25,566)
Issuance of note receivable to subsidiary	0	0	(18,000)
Purchases of property and equipment	(35)	(21)	(289)
Net cash provided by (used in) investing activities	(71,616)	(4,810)	(48,196)
Cash flow from financing activities:
Proceeds from issuance of long-term debt, net of issuance costs	19,818	0	98,390
Payment of long-term debt and prepayment penalties	0	0	(48,000)
Issuance of common stock	15,571	0	0
Issuance of common stock for share-based awards	11	42	1
Purchases of FedNat Holding Company common stock	0	(10,418)	(3,449)
Dividends from consolidated subsidiaries	0	12,376	39,174
Dividends paid	0	(5,077)	(4,309)
Net cash provided by (used in) financing activities	35,400	(3,077)	81,807
Net increase (decrease) in cash and cash equivalents	(13,538)	(2,861)	16,922
Cash and cash equivalents at beginning-of-period	18,170	21,031	4,109
Cash and cash equivalents at end-of-period	$ 4,632	$ 18,170	$ 21,031