Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Cash flows from operating activities:
Net income	$ 97,872	$ 72,469
Adjustments to reconcile net income to cash provided by (used in) operating activities:
Change in future policy benefits and other policy liabilities	122,881	63,975
Deferral of policy acquisition costs	(142,297)	(112,160)
Amortization of deferred policy acquisition costs	66,105	70,311
Change in income taxes	25,497	15,481
Realized investment (gains) losses	(1,766)	10,030
Accretion and amortization of investments	1,112	489
Depreciation and amortization	5,408	3,940
Change in reinsurance recoverables	(67,301)	8,306
Change in agent balances, due premiums and other receivables	(3,725)	274
Trading securities sold, matured, or called (acquired), net	(18,923)	(2,024)
Share-based compensation	11,653	11,161
Change in other operating assets and liabilities, net	22,942	(10,730)
Net cash provided by (used in) operating activities	119,458	131,522
Available-for-sale investments sold, matured or called:
Fixed-maturity securities — sold	10,810	25,392
Fixed-maturity securities — matured or called	94,576	116,525
Available-for-sale investments acquired:
Fixed-maturity securities	(247,253)	(132,681)
Short-term investments	50,902
Equity securities — acquired	(291)	(59)
Purchases of property and equipment and other investing activities, net	(10,182)	(9,921)
Cash collateral received (returned) on loaned securities, net	15,036	173
Sales (purchases) of short-term investments using securities lending collateral, net	(15,036)	(173)
Net cash provided by (used in) investing activities	(203,242)	(744)
Cash flows from financing activities:
Dividends paid	(18,620)	(16,530)
Common stock repurchased		(90,063)
Tax withholdings on share-based compensation	(5,966)	(5,614)
Finance leases	(66)	(67)
Net cash provided by (used in) financing activities	(24,652)	(112,274)
Effect of foreign exchange rate changes on cash	811	(2,295)
Change in cash and cash equivalents	(107,625)	16,209
Cash and cash equivalents, beginning of period	547,569	256,876
Cash and cash equivalents, end of period	$ 439,944	$ 273,085