Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Cash flows from operating activities:
Net income (loss)	$ 201,700	$ (61,833)	$ 3,070
Adjustments to reconcile net income (loss) to net cash (used in) operating activities:
Amortization of premium or discount on fixed maturity securities	227	574	1,663
Net realized (gain) on sale of investments	(24)	(324)	(436)
Unrealized loss on trading securities	41	463	774
Unrealized (gain) loss on derivative embedded conversion feature	(201,499)	54,621
Equity-based compensation	658	1,129	807
Changes in assets and liabilities:
Accrued investment income	48	241	634
Other assets	212	157	586
Cash equivalents held in trust	1,511	7,435	21,971
Restricted cash	(1,907)	(568,993)	(2,332)
Losses and loss adjustment reserves	(4,252)	(13,884)	(25,367)
Losses payable	(352)	(291)	(1,821)
Unearned premiums	(491)	(333)	(300)
Accrued ceding commission expense	(11)	(11)	(58)
Accrued interest on notes payable	(33)	(102)	(805)
Loss contract reserve change	(3,978)	(2,926)	(33,770)
Other liabilities	(294)	904	1,803
Total adjustments	(210,144)	(521,340)	(36,651)
Net cash (used in) operating activities	(8,444)	(583,173)	(33,581)
Cash flows from investing activities:
Purchase of investments	(180,439)	(269,694)	(511,103)
Proceeds from sales and maturities of investments	202,419	230,567	667,262
Net cash provided by (used in) investing activities	21,980	(39,127)	156,159
Cash flows from financing activities:
Proceeds from issuance of preferred stock		600,000	22,572
Fees incurred and paid relating to preferred stock issuance		(19,310)	(3,348)
Redeemable convertible series B preferred stock dividends	(18,000)	(16,998)
Deferred offering costs			(1,497)
Notes payable – principal repayments	(2,969)	(10,395)	(78,890)
Notes payable – principal issued		918	4,608
Net cash (used in) provided by financing activities	(20,969)	554,215	(56,555)
(Decrease) increase in cash and cash equivalents	(7,433)	(68,085)	66,023
Cash and cash equivalents, beginning of period	9,924	78,009	11,986
Cash and cash equivalents, end of period	2,491	9,924	78,009
Supplementary disclosure of cash flow information:
Cash paid during the period, Interest	$ 2,647	2,887	18,272
Supplementary disclosure of non-cash investing and financing activities:
Embedded derivative on preferred stock issuance		66,227
Notes payable issued in lieu of cash interest payments		918	4,608
Redeemable convertible series B preferred stock dividends accrued		750
Accrued fees relating to series B preferred stock issuance		$ 12,250
Preferred deemed dividend recorded due to beneficial conversion feature			$ 9,455