Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019
Cash flows from operating activities:
Net income	$ 173,979	$ 176,611
Adjustments to reconcile net income to cash provided by (used in) operating activities:
Change in future policy benefits and other policy liabilities	255,528	142,843
Deferral of policy acquisition costs	(239,733)	(212,300)
Amortization of deferred policy acquisition costs	123,488	123,390
Change in income taxes	46,389	(4,649)
Realized investment (gains) losses	8,288	(3,914)
Accretion and amortization of investments	960	(416)
Depreciation and amortization	7,819	8,490
Change in reinsurance recoverables	(63,487)	(31,208)
Change in agent balances, due premiums and other receivables	(40,553)	(23,151)
Trading securities sold, matured, or called (acquired), net	20,716	(9,700)
Share-based compensation	13,518	13,000
Change in other operating assets and liabilities, net	9,513	6,089
Net cash provided by (used in) operating activities	316,425	185,085
Available-for-sale investments sold, matured or called:
Fixed-maturity securities — sold	58,262	22,137
Fixed-maturity securities — matured or called	217,568	210,507
Short-term investments — matured or called		8,250
Equity securities — sold	257	3,136
Available-for-sale investments acquired:
Fixed-maturity securities	(253,849)	(284,423)
Equity securities — acquired	(132)	(466)
Purchases of property and equipment and other investing activities, net	(19,372)	(15,903)
Cash collateral received (returned) on loaned securities, net	1,250	(8,695)
Sales (purchases) of short-term investments using securities lending collateral, net	(1,250)	8,695
Net cash provided by (used in) investing activities	2,734	(56,762)
Cash flows from financing activities:
Dividends paid	(32,614)	(29,145)
Common stock repurchased	(176,576)	(110,731)
Tax withholdings on share-based compensation	(5,613)	(6,677)
Finance leases	(140)	(140)
Net cash provided by (used in) financing activities	(214,943)	(146,693)
Effect of foreign exchange rate changes on cash	(741)	1,207
Change in cash and cash equivalents	103,475	(17,163)
Cash and cash equivalents, beginning of period	256,876	262,138
Cash and cash equivalents, end of period	$ 360,351	$ 244,975