Condensed Consolidated Statements of Income (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Revenues
Direct premiums and escrow fees	$ 649,375	$ 651,104	$ 1,854,835	$ 1,819,193
Agent premiums	615,113	629,186	1,701,831	1,757,796
Information and other	198,680	201,819	596,090	586,179
Net investment income	67,874	44,460	167,000	117,109
Net realized investment gains (losses)	11,144	(7,001)	10,975	10,763
Total revenues	1,542,186	1,519,568	4,330,731	4,291,040
Expenses
Personnel costs	449,839	443,992	1,312,455	1,287,570
Premiums retained by agents	485,621	497,911	1,341,808	1,387,608
Other operating expenses	227,670	374,347	675,085	820,540
Provision for policy losses and other claims	122,196	120,349	336,395	333,695
Depreciation and amortization	31,729	36,000	92,534	96,292
Premium taxes	18,774	19,900	51,837	52,527
Interest	10,770	9,107	29,997	26,812
Total expenses	1,346,599	1,501,606	3,840,111	4,005,044
Income before income taxes	195,587	17,962	490,620	285,996
Income tax expense (benefit)	44,126	(3,224)	107,896	84,846
Net income	151,461	21,186	382,724	201,150
Less: Net loss attributable to noncontrolling interests	(19)	(197)	(123)	(772)
Net income attributable to the Company	$ 151,480	$ 21,383	$ 382,847	$ 201,922
Net income per share attributable to the Company's stockholders (Note 9):
Basic	$ 1.34	$ 0.19	$ 3.40	$ 1.81
Diluted	1.34	0.19	3.38	1.80
Cash dividends declared per share	$ 0.42	$ 0.38	$ 1.18	$ 1.06
Weighted-average common shares outstanding (Note 9):
Basic	112,722	111,799	112,541	111,578
Diluted	113,365	112,575	113,213	112,254