Condensed Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Sep. 30, 2014		Dec. 31, 2013
Investments:
Securities held to maturity, at amortized cost (fair value: $7,195,441 and $6,656,144)	$ 6,898,038		$ 6,510,320
Securities available for sale, at fair value (cost: $2,576,805 and $2,535,264)	2,724,880		2,651,544
Mortgage loans, net of allowance for possible losses ($650 and $650)	152,740	[1]	132,765	[1]
Policy loans	63,746		65,969
Derivatives, index options	109,812		169,314
Other long-term investments	29,006		30,991
Total investments	9,978,222		9,560,903
Cash and short-term investments	121,482		120,859
Deferred policy acquisition costs	795,452		785,706
Deferred sales inducements	160,614		169,570
Accrued investment income	100,256		95,367
Federal income tax receivable	5,650		0
Other assets	97,400		98,011
Total assets	11,259,076		10,830,416
Future policy benefits:
Universal life and annuity contracts	9,267,144		8,987,062
Traditional life reserves	137,501		138,072
Other policyholder liabilities	142,175		142,587
Deferred Federal income tax liability	36,421		7,199
Federal income tax payable	0		10,067
Other liabilities	141,697		97,481
Total liabilities	9,724,938		9,382,468
COMMITMENTS AND CONTINGENCIES (Note 8)
Common stock:
Additional paid-in capital	38,116		37,767
Accumulated other comprehensive income	47,717		38,080
Retained earnings	1,444,669		1,368,466
Total stockholders’ equity	1,534,138		1,447,948
Total liabilities and stockholders' equity	11,259,076		10,830,416
Common Class A [Member]
Common stock:
Common stock, value outstanding	3,436		3,435
Common Class B [Member]
Common stock:
Common stock, value outstanding	$ 200		$ 200

[1] Loan-to-Value Ratio determined using the most recent appraised value.