Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
REVENUE:
Gross premiums written	$ 210,756	$ 162,582	$ 346,712	$ 269,198
Decrease in gross unearned premiums	(46,171)	(41,600)	(35,625)	(33,034)
Gross premiums earned	164,585	120,982	311,087	236,164
Ceded premiums earned	(50,406)	(40,530)	(95,538)	(77,664)
Net premiums earned	114,179	80,452	215,549	158,500
Investment income	2,727	2,239	5,123	4,312
Net realized gains (losses)	102	(133)	372	(11)
Other revenue	3,913	2,782	7,438	4,935
Total revenue	120,921	85,340	228,482	167,736
EXPENSES:
Losses and loss adjustment expenses	62,611	44,627	126,869	96,598
Policy acquisition costs	25,721	21,198	52,753	40,384
Operating expenses	5,814	4,809	9,768	8,350
General and administrative expenses	11,497	6,512	19,430	13,913
Interest expense	116	68	191	151
Total expenses	105,759	77,214	209,011	159,396
Income before other income	15,162	8,126	19,471	8,340
Other income	48	61	69	185
Income before income taxes	15,210	8,187	19,540	8,525
Provision for income taxes	5,369	2,912	6,748	3,052
Net income	9,841	5,275	12,792	5,473
OTHER COMPREHENSIVE INCOME:
Change in net unrealized gains (losses) on investments	7,420	(4,892)	13,800	(2,363)
Reclassification adjustment for net realized investment (gains) losses	(102)	133	(372)	11
Income tax benefit (expense) related to items of other comprehensive income	(2,713)	1,839	(5,074)	909
Total comprehensive income	$ 14,446	$ 2,355	$ 21,146	$ 4,030
Weighted-average shares outstanding
Weighted-average shares outstanding (in shares)	21,423,739	21,255,496	21,385,220	21,145,624
Weighted-average diluted shares (in shares)	21,631,077	21,508,511	21,584,287	21,376,540
Earnings Per Share
Basic earnings per share (in usd per share)	$ 0.46	$ 0.25	$ 0.60	$ 0.26
Diluted earnings per share (in usd per share)	0.45	0.25	0.59	0.26
Dividends declared per share (in usd per share)	$ 0.06	$ 0.05	$ 0.11	$ 0.10