Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018
Cash flows from operating activities:
Net income	$ 297,075	$ 231,263
Adjustments to reconcile net income to cash provided by operating activities:
Provision for policy losses and other claims	206,842	214,199
Depreciation and amortization	65,818	60,805
Amortization of premiums and accretion of discounts on debt securities, net	11,369	13,451
Net realized investment (gains) losses	(41,057)	169
Share-based compensation	27,355	27,135
Equity in earnings of equity method investments, net	(162)	(708)
Dividends from equity method investments	2,332	1,774
Changes in assets and liabilities excluding effects of acquisitions and noncash transactions:
Claims paid, including assets acquired, net of recoveries	(199,895)	(213,538)
Net change in income tax accounts	45,174	20,560
Increase in accounts and accrued income receivable	(35,142)	(36,700)
Decrease in accounts payable and accrued liabilities	(71,196)	(59,871)
Increase (decrease) in deferred revenue	1,068	(1,149)
Other, net	(8,472)	(3,290)
Cash provided by operating activities	301,109	254,100
Cash flows from investing activities:
Net cash effect of acquisitions/dispositions	(4,725)	(73,757)
Net increase in deposits with banks	(2,268)	(757)
Purchases of debt and equity securities	(1,147,192)	(1,166,788)
Proceeds from sales of debt and equity securities	698,393	470,670
Proceeds from maturities of debt securities	342,790	282,754
Net (increase) decrease in other investments	(75,576)	563
Advances under secured financing agreements	(2,775,216)	(580,162)
Collections of secured financings receivable	2,650,317	553,632
Capital expenditures	(53,951)	(55,720)
Proceeds from sales of property and equipment	105	1,624
Cash used for investing activities	(367,323)	(567,941)
Cash flows from financing activities:
Net change in deposits	3,376	227,594
Borrowings under secured financing agreements	2,764,605	579,871
Repayments of secured financings payable	(2,650,804)	(553,513)
Borrowings under unsecured credit agreement	160,000	0
Repayments of notes and contracts payable	(162,905)	(2,681)
Net activity related to noncontrolling interests	(1,045)	(920)
Net payments in connection with share-based compensation	(8,490)	(11,229)
Purchase of Company shares	(2,066)
Payments of cash dividends	(94,105)	(84,717)
Cash provided by financing activities	8,566	154,405
Effect of exchange rate changes on cash	2,484	(1,280)
Net decrease in cash and cash equivalents	(55,164)	(160,716)
Cash and cash equivalents—Beginning of period	1,467,129	1,387,226
Cash and cash equivalents—End of period	1,411,965	1,226,510
Supplemental information:
Interest	22,936	18,591
Premium taxes	37,370	42,840
Income taxes, less refunds of $612 and $18	$ 28,902	$ 42,456