Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
REVENUE:
Gross premiums written	$ 279,617	$ 168,842
Decrease (increase) in gross unearned premiums	(667)	13,223
Gross premiums earned	278,950	182,065
Ceded premiums earned	(116,275)	(74,882)
Net premiums earned	162,675	107,183
Investment income	5,686	2,951
Net realized gains (losses)	211	(351)
Unrealized Gain (Loss) on Securities	(2,444)	0
Other revenue	13,999	12,850
Total revenue	180,127	122,633
EXPENSES:
Losses and loss adjustment expenses	77,246	63,333
Policy acquisition costs	57,135	35,436
Operating expenses	8,318	5,872
General and administrative expenses	23,325	11,333
Interest expense	2,458	759
Total expenses	168,482	116,733
Income (loss) before other income	11,645	5,900
Other income	71	38
Income (loss) before income taxes	11,716	5,938
Provision for income taxes	3,347	2,039
Net income (loss)	8,369	3,899
OTHER COMPREHENSIVE INCOME:
Change in net unrealized gains (losses) on investments	(23,384)	3,731
Reclassification adjustment for net realized investment (gains) losses	(211)	351
Income tax benefit (expense) related to items of other comprehensive income	5,923	(1,542)
Total comprehensive income	$ (9,303)	$ 6,439
Weighted-average shares outstanding
Weighted-average shares outstanding (in shares)	42,581,939	21,471,185
Weighted-average diluted shares (in shares)	42,748,627	21,688,733
Earnings Per Share
Basic earnings per share (in usd per share)	$ 0.20	$ 0.18
Diluted earnings per share (in usd per share)	0.20	0.18
Dividends declared per share (in usd per share)	$ 0.06	$ 0.06