CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Premiums written:
Direct	$ 274,726	$ 275,245	$ 544,760	$ 541,068
Assumed	2,085	685	2,177	1,973
Ceded	(21,375)	(30,096)	(54,595)	(60,505)
Net premiums written	255,436	245,834	492,342	482,536
Increase in unearned premiums, net	(8,472)	(14,698)	(13,271)	(22,297)
Net premiums earned	246,964	231,136	479,071	460,239
Investment income, net of expenses	34,502	29,716	66,623	59,193
Net realized investment losses	(1,897)	(52)	(2,226)	(177)
Other revenue	2,431	2,512	4,302	4,937
Total revenues	282,000	263,312	547,770	524,192
Losses and expenses:
Losses incurred, net	(13,455)	27,339	10,395	54,958
Amortization of deferred policy acquisition costs	2,845	2,584	5,417	4,814
Other underwriting and operating expenses, net	41,842	38,511	87,932	79,276
Interest expense	13,246	14,197	26,479	30,506
Loss on debt extinguishment	0	65	0	65
Total losses and expenses	44,478	82,696	130,223	169,619
Income before tax	237,522	180,616	417,547	354,573
Provision for income taxes	50,708	61,994	87,096	146,153
Net income	$ 186,814	$ 118,622	$ 330,451	$ 208,420
Earnings per share:
Basic (in dollars per share)	$ 0.51	$ 0.32	$ 0.89	$ 0.59
Diluted (in dollars per share)	$ 0.49	$ 0.31	$ 0.87	$ 0.55
Weighted average common shares outstanding - basic (in shares)	368,578	366,918	369,736	354,035
Weighted average common shares outstanding - diluted (in shares)	388,881	394,470	390,236	398,302