Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014
Cash flows from operating activities:
Net income	$ 207,135	$ 153,477
Adjustments to reconcile net income to cash provided by operating activities:
Provision for policy losses and other claims	363,550	337,739
Depreciation and amortization	63,389	63,879
Amortization of premiums and accretion of discounts on debt securities, net	21,702	17,984
Excess tax benefits from share-based compensation	(8,496)	(6,050)
Net realized investment losses (gains)	215	(23,261)
Share-based compensation	20,261	15,962
Equity in earnings of affiliates, net	(7,710)	(1,068)
Dividends from equity method investments	7,559	4,018
Changes in assets and liabilities excluding effects of acquisitions and noncash transactions:
Claims paid, including assets acquired, net of recoveries	(364,255)	(353,048)
Net change in income tax accounts	56,784	55,372
Increase in accounts and accrued income receivable	(32,194)	(23,191)
Decrease in accounts payable and accrued liabilities	(7,074)	(74,407)
Increase in deferred revenue	12,049	6,780
Other, net	19,282	(8,015)
Cash provided by operating activities	352,197	166,171
Cash flows from investing activities:
Net cash effect of acquisitions/dispositions	(26,662)	(162,910)
Net decrease in deposits with banks	2,471	2,888
Purchases of debt and equity securities	(1,726,939)	(1,203,474)
Proceeds from sales of debt and equity securities	443,276	627,174
Proceeds from maturities of debt securities	531,440	276,812
Net change in other investments	470	5,093
Net paydowns on loans receivable		20,002
Capital expenditures	(91,964)	(63,923)
Proceeds from sales of property and equipment	17,057	11,675
Cash used for investing activities	(850,851)	(486,663)
Cash flows from financing activities:
Net change in deposits	288,495	606,373
Net proceeds from issuance of debt		300,503
Repayment of debt	(4,087)	(161,878)
Net activity related to noncontrolling interests	(705)	(658)
Excess tax benefits from share-based compensation	8,496	6,050
Net (payments) proceeds in connection with share-based compensation plans	(1,534)	885
Cash dividends	(81,283)	(64,159)
Cash provided by financing activities	209,382	687,116
Effect of exchange rate changes on cash	(6,378)	2,412
Net (decrease) increase in cash and cash equivalents	(295,650)	369,036
Cash and cash equivalents—Beginning of period	1,190,080	834,837
Cash and cash equivalents—End of period	894,430	1,203,873
Supplemental information:
Interest	21,166	15,701
Premium taxes	45,683	47,729
Income taxes, less refunds of $711 and $9,843	$ 52,069	$ 20,510