Condensed Consolidated Statements of Income (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Revenues
Direct premiums and escrow fees	$ 651,104	$ 649,726	$ 1,819,193	$ 1,775,615
Agent premiums	629,186	625,953	1,757,796	1,653,990
Information and other	201,819	188,727	586,179	526,575
Net investment income	44,460	34,422	117,109	92,717
Net realized investment (losses) gains	(7,001)	9,516	10,763	22,692
Total revenues	1,519,568	1,508,344	4,291,040	4,071,589
Expenses
Personnel costs	599,380	438,692	1,458,928	1,239,129
Premiums retained by agents	497,911	495,130	1,387,608	1,303,838
Other operating expenses	218,959	219,959	649,182	622,995
Provision for policy losses and other claims	120,349	137,015	333,695	366,473
Depreciation and amortization	36,000	24,491	96,292	70,905
Premium taxes	19,900	18,288	52,527	48,692
Interest	9,107	7,838	26,812	23,427
Total expenses	1,501,606	1,341,413	4,005,044	3,675,459
Income before income taxes	17,962	166,931	285,996	396,130
Income tax (benefit) expense	(3,224)	59,539	84,846	133,615
Net income	21,186	107,392	201,150	262,515
Less: Net (loss) income attributable to noncontrolling interests	(197)	72	(772)	545
Net income attributable to the Company	$ 21,383	$ 107,320	$ 201,922	$ 261,970
Net income per share attributable to the Company's stockholders (Note 8):
Basic	$ 0.19	$ 0.97	$ 1.81	$ 2.37
Diluted	0.19	0.96	1.80	2.36
Cash dividends declared per share	$ 0.38	$ 0.34	$ 1.06	$ 0.86
Weighted-average common shares outstanding (Note 8):
Basic	111,799	110,571	111,578	110,423
Diluted	112,575	111,251	112,254	111,006