Condensed Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Jun. 30, 2013	Dec. 31, 2012
Investments:
Fixed maturities, available-for-sale, at fair value (amortized cost $15,509,767 and $16,756,216)	$ 16,281,559	$ 18,188,344
Fixed maturities, held for trading, at fair value (amortized cost $193,451 and $356,012)	198,926	367,600
Mortgage loans on real estate (net of allowances of $2,890 and $2,890)	3,057,906	2,881,758
Policy loans	4,181,279	4,260,200
Short-term investments, available-for-sale (amortized cost $1,997,680 and $266,332)	1,997,680	266,332
Limited partnership and other corporation interests	102,000	124,814
Other investments	19,682	21,328
Total investments	25,839,032	26,110,376
Other assets:
Cash	5,558	11,387
Reinsurance receivable	618,858	638,797
Deferred acquisition costs and value of business acquired	314,368	204,461
Investment income due and accrued	241,110	257,028
Collateral under securities lending agreements	64,116	142,022
Due from parent and affiliates	91,003	82,828
Goodwill	105,255	105,255
Other intangible assets	16,853	18,249
Other assets	659,179	609,623
Assets of discontinued operations	30,681	33,053
Separate account assets	25,369,168	24,605,526
Total assets	53,355,181	52,818,605
Policy benefit liabilities:
Future policy benefits	23,792,497	23,480,618
Policy and contract claims	319,295	321,375
Policyholders' funds	373,373	374,821
Provision for policyholders' dividends	64,761	63,102
Undistributed earnings on participating business	12,406	10,393
Total policy benefit liabilities	24,562,332	24,250,309
General liabilities:
Due to parent and affiliates	537,450	544,447
Commercial paper	93,788	97,987
Payable under securities lending agreements	64,116	142,022
Deferred income tax liabilities, net	121,157	288,995
Other liabilities	746,545	719,969
Liabilities of discontinued operations	30,681	33,053
Separate account liabilities	25,369,168	24,605,526
Total liabilities	51,525,237	50,682,308
Commitments and contingencies
Stockholder's equity:
Preferred stock, $1 par value, 50,000,000 shares authorized; none issued and outstanding
Common stock, $1 par value, 50,000,000 shares authorized; 7,032,000 shares issued and outstanding	7,032	7,032
Additional paid-in capital	772,360	771,041
Accumulated other comprehensive income (loss)	311,682	635,699
Retained earnings	738,870	722,525
Total stockholder's equity	1,829,944	2,136,297
Total liabilities and stockholder's equity	$ 53,355,181	$ 52,818,605