Consolidated Statements of Operations - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
REVENUES:
Net premiums written	$ 1,646,838	$ 1,663,722
Change in net unearned premiums	(76,796)	(136,387)
Net premiums earned	1,570,042	1,527,335
Net investment income	148,858	130,133
Insurance service fees	33,280	40,362
Net realized investment gains	52,348	25,457
Marketable Securities, Realized Loss, Other than Temporary Impairments, Amount	0	18,114
Revenues from non-insurance businesses	65,390	101,780
Other income	500	258
Total revenues	1,870,418	1,807,211
OPERATING COSTS AND EXPENSES:
Losses and loss expenses	979,603	922,321
Other operating costs and expenses	603,700	582,459
Expenses from non-insurance businesses	66,019	95,531
Interest expense	36,799	32,224
Total operating costs and expenses	1,686,121	1,632,535
Income before income taxes	184,297	174,676
Income tax expense	(59,623)	(54,428)
Net income before noncontrolling interests	124,674	120,248
Noncontrolling interests	(1,227)	(737)
Net income to common stockholders	$ 123,447	$ 119,511
NET INCOME PER SHARE:
Basic	$ 1.01	$ 0.97
Diluted	$ 0.96	$ 0.93