Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014
Cash flows from operating activities:
Net cash provided by operating activities	$ 356,792	$ 467,517
Proceeds from sales, maturities and redemptions of investments:
Fixed maturities, available-for-sale	3,723,042	3,029,196
Mortgage loans on real estate	179,363	195,091
Limited partnership interests, other corporation interests and other investments	3,033	5,243
Purchases of investments:
Fixed maturities, available-for-sale	(1,762,463)	(1,178,368)
Mortgage loans on real estate	(177,185)	(156,889)
Limited partnership interests, other corporation interests and other investments	(883)	(1,745)
Net change in short-term investments	(2,371,057)	(2,630,848)
Net change in policy loans	(396)	(4,314)
Purchases of furniture, equipment and software	(40,551)	(11,500)
Net cash used in investing activities	(447,097)	(754,134)
Cash flows from financing activities:
Contract deposits	1,090,823	1,258,359
Contract withdrawals	(794,349)	(850,678)
Net change in due to/from parent and affiliates	(9,444)	24,012
Dividends paid	(112,110)	(135,601)
Proceeds from financing element derivatives	0	1,556
Payments for and interest paid on financing element derivatives, net	(7,572)	(6,689)
Net change in commercial paper borrowings	(100)	901
Net change in book overdrafts	3,887	190
Income tax benefit of stock option exercises	594	48
Net cash provided by financing activities	171,729	292,098
Net increase in cash	81,424	5,481
Cash, beginning of year	12,775	7,491
Cash, end of period	94,199	12,972
Net cash (paid) received during the year for:
Income taxes	(20,505)	19,553
Interest	(18,632)	(18,646)
Non-cash investing and financing transactions during the years:
Share-based compensation expense	$ 781	$ 2,383