Schedule II - Condensed Financial Information of Registrant, Condensed Statements of Cash Flows (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Cash flow from operating activities [Abstract]
Net income	$ 50	$ 40,440	$ 37,199
Adjustments to reconcile net income to net cash provided by (used in) operating activities:
Depreciation and amortization	869	624	149
Share-based compensation	4,420	4,527	2,140
Changes in operating assets and liabilities [Abstract]
Deferred income taxes, net of other comprehensive income	(2,575)	6,741	765
Income taxes receivable, net	(11,769)	(2,445)	(4,189)
Other, net	8,120	135	4,411
Net cash provided by operating activities	69,750	52,891	63,144
Cash flow from investing activities [Abstract]
Sales, maturities and redemptions of investments securities	311,109	169,979	87,151
Purchases of property and equipment	(2,147)	(1,736)	(969)
Net cash used in investing activities	(33,151)	(63,641)	(107,905)
Net Cash Provided by (Used in) Financing Activities, Continuing Operations [Abstract]
Noncontrolling interest equity investment		18,743
Tax benefit related to share-based compensation	589	1,564	480
Issuance of common stock for share-based awards	361	171	1,555
Purchases of FNHC common stock	(11,317)
Dividends paid	(4,677)	(1,847)	(1,672)
Net cash (used in) provided by financing activities	(15,044)	23,631	43,472
Net increase in cash and cash equivalents	21,555	12,881	(1,289)
Cash and cash equivalents at beginning of period	53,038	40,157	41,446
Cash and cash equivalents at end of period	74,593	53,038	40,157
Parent Company [Member]
Cash flow from operating activities [Abstract]
Net income	50	40,440	37,199
Adjustments to reconcile net income to net cash provided by (used in) operating activities:
Equity in undistributed income of consolidated subsidiaries	(9,480)	(71,905)	(61,653)
Depreciation and amortization	73	64	92
Share-based compensation	4,420	4,527	2,140
Changes in operating assets and liabilities [Abstract]
Deferred income taxes, net of other comprehensive income	2,127	(153)	674
Income taxes receivable, net	2,978	24,352	16,521
Capital contribution payable		(18,501)	2,501
Due to subsidiaries	23,574	6,430	(2,069)
Other, net	3,786	2,057	4,460
Net cash provided by operating activities	27,528	(12,689)	(135)
Cash flow from investing activities [Abstract]
Capital contributions to consolidated subsidiaries, net		(32,743)	(18,501)
Sales, maturities and redemptions of investments securities	76,928	38,612	22,414
Purchases of investment securities	(83,724)	(21,354)	(36,949)
Purchases of property and equipment	(299)	(113)	(391)
Net cash used in investing activities	(7,095)	(15,598)	(33,427)
Net Cash Provided by (Used in) Financing Activities, Continuing Operations [Abstract]
Noncontrolling interest equity investment		18,743
Tax benefit related to share-based compensation	589	1,564	480
Issuance of common stock for share-based awards	361	171	1,555
Issuance of common stock in public offering			43,109
Purchases of FNHC common stock	(11,317)
Dividends paid	(4,677)	(1,847)	(1,672)
Net cash (used in) provided by financing activities	(15,044)	18,631	43,472
Net increase in cash and cash equivalents	5,389	(9,656)	9,910
Cash and cash equivalents at beginning of period	2,397	12,053	2,143
Cash and cash equivalents at end of period	$ 7,786	$ 2,397	$ 12,053