Consolidated Statements of Income - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Revenues
Premium income	$ 465,349	$ 445,550	$ 446,395
Fee income	956,817	944,526	729,179
Other revenue	12,261	13,563	7,506
Net investment income	1,276,559	1,254,430	1,228,388
Realized investment gains (losses), net:
Total other-than-temporary losses	(4,963)	(1,044)	(4,334)
Other-than-temporary (gains) losses transferred to other comprehensive income	0	(78)	0
Other realized investment gains (losses), net	97,845	84,832	151,705
Total realized investment gains (losses), net	92,882	83,710	147,371
Total revenues	2,803,868	2,741,779	2,558,839
Benefits and expenses:
Life and other policy benefits	709,333	636,855	643,420
Decrease in future policy benefits	(124,576)	(41,636)	(56,073)
Interest paid or credited to contractholders	608,803	583,319	575,400
Provision for policyholders’ share of losses on participating business	(1,024)	(1,267)	(1,041)
Dividends to policyholders	48,487	57,356	60,739
Total benefits	1,241,023	1,234,627	1,222,445
General insurance expenses	1,181,227	1,078,996	780,991
Amortization of DAC and VOBA	31,309	100,589	44,845
Interest expense	33,705	38,588	37,286
Total benefits and expenses	2,487,264	2,452,800	2,085,567
Total before tax	316,604	288,979	473,272
Income tax expense	85,512	98,524	155,903
Net income	$ 231,092	$ 190,455	$ 317,369