Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015
Cash flows from operating activities:
Net cash provided by operating activities	$ 559,179	$ 575,631
Proceeds from sales, maturities and redemptions of investments:
Fixed maturities, available-for-sale	4,829,009	4,196,254
Mortgage loans on real estate	310,664	277,454
Limited partnership interests, other corporation interests and other investments	9,386	4,001
Purchases of investments:
Fixed maturities, available-for-sale	(4,138,915)	(2,791,939)
Mortgage loans on real estate	(626,431)	(233,924)
Limited partnership interests, other corporation interests and other investments	(5,491)	(1,496)
Net change in short-term investments	(1,988,191)	(2,198,699)
Net change in policy loans	5,980	(7,481)
Purchases of furniture, equipment and software	(33,405)	(60,321)
Net cash used in investing activities	(1,637,394)	(816,151)
Cash flows from financing activities:
Contract deposits	2,756,047	1,760,310
Contract withdrawals	(1,500,963)	(1,308,587)
Net change in due to/from parent and affiliates	(19,924)	(15,686)
Dividends paid	(125,691)	(139,711)
Payments for and interest paid on financing element derivatives, net	(5,281)	(8,027)
Contingent consideration	(14,233)	0
Net change in commercial paper borrowings	6,600	(2,305)
Net change in book overdrafts	121	(1,164)
Income tax benefit on share-based compensation	468	1,031
Net cash provided by financing activities	1,097,144	285,861
Net increase in cash	18,929	45,341
Cash, beginning of year	34,362	12,775
Cash, end of period	53,291	58,116
Net cash paid during the year for:
Income taxes	(24,118)	(29,791)
Interest	(21,685)	(18,697)
Non-cash investing and financing transactions during the years:
Share-based compensation expense	$ 1,637	$ 1,247