Condensed Consolidated Statements of Income and Comprehensive Income (Unaudited) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Revenues
Gross written premiums	$ 380,003	$ 293,378	$ 707,337	$ 591,494
Ceded written premiums	(140,093)	(104,772)	(259,686)	(191,910)
Net written premiums	239,910	188,606	447,651	399,584
Change in net unearned premiums	(40,796)	19,604	(58,385)	9,568
Net earned premiums	199,114	208,210	389,266	409,152
Net investment income	17,535	16,135	36,966	29,391
Net realized and unrealized gains (losses) on investments	1,063	(64)	2,688	(874)
Other income	2,662	3,760	5,581	8,716
Total revenues	220,374	228,041	434,501	446,385
Expenses
Losses and loss adjustment expenses	147,053	154,595	286,980	298,367
Other operating expenses	44,843	51,751	90,595	106,534
Other expenses	683	93	683	97
Interest expense	2,684	2,946	5,492	5,468
Amortization of intangible assets	149	149	298	298
Total expenses	195,412	209,534	384,048	410,764
Income before taxes	24,962	18,507	50,453	35,621
Income tax expense	4,655	1,523	7,418	3,004
Net income	20,307	16,984	43,035	32,617
Other comprehensive income (loss):
Net unrealized gains (losses), net of taxes of $1,865 and $3,311 in 2019 and $(183) and $(727) in 2018	20,732	(6,558)	40,992	(25,105)
Total comprehensive income	$ 41,039	$ 10,426	$ 84,027	$ 7,512
Per share data:
Basic earnings per share (in dollars per share)	$ 0.67	$ 0.57	$ 1.43	$ 1.09
Diluted earnings per share (in dollars per share)	0.66	0.56	1.41	1.08
Dividend declared per share (in dollars per share)	$ 0.30	$ 0.30	$ 0.60	$ 0.60
Weighted-average common shares outstanding:
Basic (in shares)	30,246,420	29,882,988	30,153,426	29,823,982
Diluted (in shares)	30,689,074	30,293,933	30,581,205	30,243,946