Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019
Cash flows from operating activities:
Net income	$ 286,080	$ 272,834
Adjustments to reconcile net income to cash provided by (used in) operating activities:
Change in future policy benefits and other policy liabilities	399,193	206,624
Deferral of policy acquisition costs	(377,610)	(320,224)
Amortization of deferred policy acquisition costs	170,979	187,273
Change in income taxes	(7,845)	(8,216)
Realized investment (gains) losses	7,645	(4,200)
Accretion and amortization of investments	779	(503)
Depreciation and amortization	12,486	13,285
Change in reinsurance recoverables	(69,774)	(15,650)
Change in agent balances, due premiums and other receivables	(53,815)	(31,838)
Trading securities sold, matured, or called (acquired), net	29,582	51
Share-based compensation	15,737	15,069
Change in other operating assets and liabilities, net	(9,484)	6,826
Net cash provided by (used in) operating activities	403,953	321,331
Available-for-sale investments sold, matured or called:
Fixed-maturity securities — sold	62,925	33,472
Fixed-maturity securities — matured or called	335,053	305,349
Short-term investments — matured or called		8,250
Equity securities — sold	2,508	3,136
Available-for-sale investments acquired:
Fixed-maturity securities	(435,934)	(444,160)
Equity securities — acquired	(179)	(818)
Purchases of property and equipment and other investing activities, net	(22,450)	(19,988)
Cash collateral received (returned) on loaned securities, net	20,160	(12,629)
Sales (purchases) of short-term investments using securities lending collateral, net	(20,160)	12,629
Net cash provided by (used in) investing activities	(58,077)	(114,759)
Cash flows from financing activities:
Dividends paid	(48,496)	(43,468)
Common stock repurchased	(218,079)	(181,069)
Tax withholdings on share-based compensation	(5,666)	(7,017)
Finance leases	(209)	(211)
Net cash provided by (used in) financing activities	(272,450)	(231,765)
Effect of foreign exchange rate changes on cash	575	801
Change in cash and cash equivalents	74,001	(24,392)
Cash and cash equivalents, beginning of period	256,876	262,138
Cash and cash equivalents, end of period	$ 330,877	$ 237,746