Condensed Consolidated Balance Sheets (USD $) In Thousands	Jun. 30, 2011	Dec. 31, 2010
Investments:
Securities held to maturity, at amortized cost (fair value: $5,636,086 and $5,259,332)	$ 5,302,866	$ 4,977,516
Securities available for sale, at fair value (cost: $2,304,913 and $2,221,579)	2,493,163	2,390,107
Mortgage loans, net of allowance for possible losses ($4,001 and $3,962)	160,897	141,247
Policy loans	75,743	78,448
Derivatives, index options	97,698	80,284
Other long-term investments	33,355	29,569
Total investments	8,163,722	7,697,171
Cash and short-term investments	80,667	80,332
Deferred policy acquisition costs	702,458	691,939
Deferred sales inducements	146,045	143,844
Accrued investment income	85,687	79,720
Federal income tax receivable	0	427
Other assets	83,851	80,515
Total assets	9,262,430	8,773,948
Future policy benefits:
Universal life and annuity contracts	7,561,174	7,108,599
Traditional life and annuity contracts	138,377	139,182
Other policyholder liabilities	145,753	151,526
Deferred Federal income tax liability	46,695	57,857
Federal income tax payable	3,843	0
Other liabilities	110,078	97,993
Total liabilities	8,005,920	7,555,157
COMMITMENTS AND CONTINGENCIES (Note 8)
Common stock:
Additional paid-in capital	38,351	37,140
Accumulated other comprehensive income	54,909	50,408
Retained earnings	1,159,615	1,127,614
Total stockholders’ equity	1,256,510	1,218,791
Total liabilities and stockholders' equity	9,262,430	8,773,948
Common Class A [Member]
Common stock:
Common stock, value outstanding	3,435	3,429
Common Class B [Member]
Common stock:
Common stock, value outstanding	$ 200	$ 200