Condensed Consolidated Statements of Income (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Revenues
Direct premiums and escrow fees	$ 649,726	$ 605,450	$ 1,775,615	$ 1,716,468
Agent premiums	625,953	585,974	1,653,990	1,520,507
Information and other	188,727	173,349	526,575	511,334
Net investment income	34,422	22,272	92,717	70,694
Net realized investment gains (losses)	9,516	(3,130)	22,692	(215)
Total revenues	1,508,344	1,383,915	4,071,589	3,818,788
Expenses
Personnel costs	438,692	411,743	1,239,129	1,185,318
Premiums retained by agents	495,130	462,535	1,303,838	1,200,549
Other operating expenses	219,959	209,316	622,995	621,298
Provision for policy losses and other claims	137,015	139,126	366,473	363,550
Depreciation and amortization	24,491	21,072	70,905	63,389
Premium taxes	18,288	17,439	48,692	46,920
Interest	7,838	7,288	23,427	21,798
Total expenses	1,341,413	1,268,519	3,675,459	3,502,822
Income before income taxes	166,931	115,396	396,130	315,966
Income taxes	59,539	39,637	133,615	108,831
Net income	107,392	75,759	262,515	207,135
Less: Net income attributable to noncontrolling interests	72	217	545	615
Net income attributable to the Company	$ 107,320	$ 75,542	$ 261,970	$ 206,520
Net income per share attributable to the Company's stockholders (Note 9):
Basic	$ 0.97	$ 0.69	$ 2.37	$ 1.91
Diluted	0.96	0.69	2.36	1.88
Cash dividends declared per share	$ 0.34	$ 0.25	$ 0.86	$ 0.75
Weighted-average common shares outstanding (Note 9):
Basic	110,571	108,647	110,423	108,284
Diluted	111,251	110,004	111,006	109,706