Condensed Consolidated Statements of Income - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Revenues:
Premium income	$ 78,155	$ 67,663	$ 222,836	$ 219,904
Fee income	286,696	267,338	562,660	522,453
Other revenue	3,077	3,661	6,062	6,045
Net investment income	327,471	297,221	665,612	610,691
Investment gains (losses), net	40,256	22,064	(3,487)	10,310
Total revenues	735,655	657,947	1,453,683	1,369,403
Benefits and expenses:
Life and other policy benefits	166,613	166,995	354,157	337,283
Decrease in future policy benefits	(77,381)	(63,978)	(99,390)	(63,852)
Interest credited or paid to contractholders	164,397	157,544	325,680	311,490
Provision for policyholders’ share of losses on participating business	(340)	(62)	(856)	(64)
Dividends to policyholders	7,397	9,045	19,679	24,114
Total benefits	260,686	269,544	599,270	608,971
General insurance expenses	308,545	284,364	606,677	591,495
Amortization of DAC and VOBA	30,957	20,401	42,249	25,723
Interest expense	9,588	7,646	17,397	15,276
Total benefits and expenses	609,776	581,955	1,265,593	1,241,465
Income before income taxes	125,879	75,992	188,090	127,938
Income tax expense	27,251	26,168	40,804	43,286
Net income	$ 98,628	$ 49,824	$ 147,286	$ 84,652