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Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017
Cash flows from operating activities:
Net income	$ 152,414	$ 115,176
Adjustments to reconcile net income to cash provided by (used in) operating activities:
Change in future policy benefits and other policy liabilities	111,917	139,105
Deferral of policy acquisition costs	(221,934)	(208,391)
Amortization of deferred policy acquisition costs	114,011	99,710
Change in income taxes	6,023	10,020
Realized investment (gains) losses, including other-than-temporary impairments	344	(238)
Accretion and amortization of investments	(675)	(684)
Depreciation and amortization	5,994	6,994
Change in reinsurance recoverables	(9,280)	11,394
Change in agent balances, due premiums and other receivables	(9,780)	(13,475)
Trading securities sold, matured, or called (acquired), net	(18,309)	(8,173)
Share-based compensation	13,392	11,667
Change in other operating assets and liabilities, net	19,918	(43,235)
Net cash provided by (used in) operating activities	164,035	119,870
Cash flows from investing activities:
Fixed-maturity securities — sold	30,825	43,232
Fixed-maturity securities — matured or called	209,438	98,904
Available-for-sale equity securities — sold		562
Equity securities — sold	1,819
Fixed-maturity securities — acquired	(357,861)	(214,974)
Available-for-sale equity securities — acquired		(212)
Equity securities — acquired	(130)
Purchases of property and equipment and other investing activities, net	(6,154)	(6,194)
Cash collateral received (returned) on loaned securities, net	(7,690)	42,229
Sales (purchases) of short-term investments using securities lending collateral, net	7,690	(42,229)
Net cash provided by (used in) investing activities	(122,063)	(78,682)
Cash flows from financing activities:
Dividends paid	(22,364)	(17,680)
Common stock repurchased	(133,776)	(75,042)
Tax withholdings on share-based compensation	(5,237)	(6,497)
Net cash provided by (used in) financing activities	(161,377)	(99,219)
Effect of foreign exchange rate changes on cash	(1,277)	554
Change in cash and cash equivalents	(120,682)	(57,477)
Cash and cash equivalents, beginning of period	279,962	211,976
Cash and cash equivalents, end of period	$ 159,280	$ 154,499

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