Condensed Consolidated Statements of Income (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Revenues:
Premium income	$ 137,401	$ 140,032	$ 382,080	$ 343,510
Fee income	152,343	132,202	453,596	394,305
Other revenue			7,355
Net investment income	375,041	299,675	909,006	892,942
Realized investment gains (losses), net:
Total other-than-temporary impairments		(224)	(61)	(478)
Other-than-temporary impairments transferred to other comprehensive loss			(434)
Other realized investment gains (losses), net	(55,820)	59,265	(64,900)	113,059
Total realized investment gains (losses), net	(55,820)	59,041	(65,395)	112,581
Total revenues	608,965	630,950	1,686,642	1,743,338
Benefits and expenses:
Life and other policy benefits	161,908	160,665	471,544	521,119
Increase (decrease) in future policy benefits	26,209	28,185	38,495	(30,103)
Interest credited or paid to contractholders	131,401	130,396	380,128	388,085
Provision for policyholders' share of (losses) earnings on participating business	(506)	(428)	3,990	1,760
Dividends to policyholders	15,452	14,904	50,172	47,628
Total benefits, net	334,464	333,722	944,329	928,489
General insurance expenses	160,120	152,569	482,302	444,185
Amortization of DAC and VOBA	(211)	15,937	30,091	48,428
Interest expense	9,334	9,350	28,008	28,040
Total benefits and expenses, net	503,707	511,578	1,484,730	1,449,142
Income before income taxes	105,258	119,372	201,912	294,196
Income tax expense	33,287	48,797	67,159	107,673
Net income	$ 71,971	$ 70,575	$ 134,753	$ 186,523