CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Premiums written:
Direct	$ 273,897	$ 270,034
Assumed	1,107	92
Ceded	(30,723)	(33,220)
Net premiums written	244,281	236,906
Decrease (increase) in unearned premiums, net	5,480	(4,799)
Net premiums earned	249,761	232,107
Investment income, net of expenses	40,585	32,121
Net realized investment losses	(526)	(329)
Other revenue	1,830	1,871
Total revenues	291,650	265,770
Losses and expenses:
Losses incurred, net	39,063	23,850
Amortization of deferred policy acquisition costs	2,478	2,572
Other underwriting and operating expenses, net	45,940	46,090
Interest expense	13,233	13,233
Total losses and expenses	100,714	85,745
Income before tax	190,936	180,025
Provision for income taxes	38,995	36,388
Net income	$ 151,941	$ 143,637
Earnings per share:
Basic (in dollars per share)	$ 0.43	$ 0.39
Diluted (in dollars per share)	$ 0.42	$ 0.38
Weighted average common shares outstanding - basic (in shares)	355,653	370,908
Weighted average common shares outstanding - diluted (in shares)	376,667	391,562