Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Investments:
Securities held to maturity, at amortized cost (fair value: $7,335,436 and $7,175,443)	$ 7,173,967	$ 6,841,543
Securities available for sale, at fair value (amortized cost: $2,847,414 and $2,590,074)	2,879,583	2,728,680
Mortgage loans, net of allowance for possible losses ($650 and $650)	108,311	149,503
Policy loans	61,957	63,645
Derivatives, index options	38,409	114,287
Other long-term investments	26,787	28,774
Total investments	10,289,014	9,926,432
Cash and cash equivalents	106,007	277,078
Deferred policy acquisition costs	853,451	802,919
Deferred sales inducements	159,166	159,766
Accrued investment income	99,619	96,127
Federal income tax receivable	12,512	0
Other assets	92,807	89,570
Total assets	11,612,576	11,351,892
Future policy benefits:
Universal life and annuity contracts	9,561,358	9,384,297
Traditional life reserves	138,000	138,225
Other policyholder liabilities	155,261	139,222
Deferred Federal income tax liability	49,333	31,675
Federal income tax payable	0	3,336
Other liabilities	96,638	98,817
Total liabilities	10,000,590	9,795,572
COMMITMENTS AND CONTINGENCIES (Notes 4, 7, and 9)	0	0
Common stock:
Additional paid-in capital	41,716	38,116
Accumulated other comprehensive income	329	41,786
Retained earnings	1,569,905	1,472,782
Total stockholders' equity	1,611,986	1,556,320
Total liabilities and stockholders' equity	11,612,576	11,351,892
Common Class A [Member]
Common stock:
Common stock, value outstanding	34	3,436
Common Class B [Member]
Common stock:
Common stock, value outstanding	$ 2	$ 200