Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
REVENUE:
Gross premiums written	$ 384,662	$ 352,347	$ 664,279	$ 521,189
Decrease (increase) in gross unearned premiums	(95,021)	(90,763)	(95,688)	(77,540)
Gross premiums earned	289,641	261,584	568,591	443,649
Ceded premiums earned	(118,335)	(101,966)	(232,385)	(176,848)
Net premiums earned	171,306	159,618	336,206	266,801
Investment income	7,091	4,637	12,777	7,588
Net realized gains (losses)	(438)	(132)	(227)	(483)
Unrealized Gain (Loss) on Securities	1,381	0	(1,063)
Other revenue	3,808	13,950	7,508	26,800
Total revenue	183,148	178,073	355,201	300,706
EXPENSES:
Losses and loss adjustment expenses	88,595	86,938	165,841	150,271
Policy acquisition costs	50,454	43,320	99,516	78,756
Operating expenses	9,682	6,257	18,000	12,129
General and administrative expenses	12,643	28,176	35,968	39,509
Interest expense	2,458	752	4,916	1,511
Total expenses	163,832	165,443	324,241	282,176
Income (loss) before other income	19,316	12,630	30,960	18,530
Other income	16	20	87	58
Income (loss) before income taxes	19,332	12,650	31,047	18,588
Provision for income taxes	4,631	5,393	7,978	7,432
Net income (loss)	14,701	7,257	23,069	11,156
OTHER COMPREHENSIVE INCOME:
Change in net unrealized gains (losses) on investments	(3,968)	4,106	(27,352)	7,837
Reclassification adjustment for net realized investment (gains) losses	438	132	227	483
Income tax benefit (expense) related to items of other comprehensive income	488	(1,615)	6,411	(3,157)
Total comprehensive income	$ 11,659	$ 9,880	$ 2,355	$ 16,319
Weighted-average shares outstanding
Weighted-average shares outstanding (in shares)	42,648,660	41,799,041	42,615,484	31,691,267
Weighted-average diluted shares (in shares)	42,790,346	42,028,013	42,769,602	31,914,559
Earnings Per Share
Basic earnings per share (in usd per share)	$ 0.34	$ 0.17	$ 0.54	$ 0.35
Diluted earnings per share (in usd per share)	$ 0.34	0.17	0.54	0.35
Dividends declared per share (in usd per share)		$ 0.06	$ 0.12	$ 0.12