CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Premiums written:
Direct	$ 286,059	$ 280,229	$ 843,145	$ 824,989
Assumed	1,793	(3,020)	4,405	(843)
Ceded	(28,438)	(25,326)	(100,257)	(79,921)
Net premiums written	259,414	251,883	747,293	744,225
Decrease (increase) in unearned premiums, net	8,443	(1,457)	17,427	(14,728)
Net premiums earned	267,857	250,426	764,720	729,497
Investment income, net of expenses	42,715	36,380	125,723	103,003
Net realized investment gains (losses)	4,205	1,114	3,986	(1,112)
Other revenue	3,606	2,525	7,921	6,827
Total revenues	318,383	290,445	902,350	838,215
Losses and expenses:
Losses incurred, net	33,985	(1,518)	94,884	8,877
Amortization of deferred policy acquisition costs	3,142	3,156	8,380	8,573
Other underwriting and operating expenses, net	45,197	43,655	134,097	131,587
Interest expense	12,939	13,258	39,722	39,737
Total losses and expenses	95,263	58,551	277,083	188,774
Income before tax	223,120	231,894	625,267	649,441
Provision for income taxes	46,186	49,994	128,614	137,090
Net income	$ 176,934	$ 181,900	$ 496,653	$ 512,351
Earnings per share:
Basic (in dollars per share)	$ 0.50	$ 0.50	$ 1.40	$ 1.40
Diluted (in dollars per share)	$ 0.49	$ 0.49	$ 1.36	$ 1.36
Weighted average common shares outstanding - basic (in shares)	351,475	362,180	354,272	367,190
Weighted average common shares outstanding - diluted (in shares)	372,575	382,905	375,266	387,765