CONSOLIDATED STATEMENTS OF OPERATIONS (UNAUDITED) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Revenues
Insurance premiums and contract charges earned	$ 206,820	$ 198,935	$ 615,428	$ 590,375
Net investment income	99,083	92,320	288,048	275,025
Net investment gains (losses)	2,803	(3,486)	1,884	(1,656)
Other income	2,612	2,048	7,704	4,813
Total revenues	311,318	289,817	913,064	868,557
Benefits, losses and expenses
Benefits, claims and settlement expenses	161,846	134,895	473,686	444,870
Interest credited	52,124	50,078	153,229	148,200
DAC amortization expense	26,066	24,210	79,357	73,904
Operating expenses	50,989	44,172	149,376	139,156
Interest expense	3,253	2,978	9,717	8,879
Total benefits, losses and expenses	294,278	256,333	865,365	815,009
Income before income taxes	17,040	33,484	47,699	53,548
Income tax expense	4,512	6,933	9,099	9,418
Net income	$ 12,528	$ 26,551	$ 38,600	$ 44,130
Net income per share
Basic (in usd per share)	$ 0.30	$ 0.64	$ 0.93	$ 1.07
Diluted (in usd per share)	$ 0.30	$ 0.64	$ 0.93	$ 1.06
Weighted average number of shares and equivalent shares
Basic (in shares)	41,683	41,433	41,586	41,337
Diluted (in shares)	41,850	41,575	41,727	41,467
Net investment gains (losses)
Total other-than-temporary impairment losses on securities	$ (70)	$ (6,092)	$ (1,357)	$ (12,452)
Portion of losses recognized in other comprehensive income (loss)	0	0	0	0
Net other-than-temporary impairment losses on securities recognized in earnings	(70)	(6,092)	(1,357)	(12,452)
Sales and other, net	(1,331)	2,365	2,661	10,050
Change in fair value - equity securities	2,000	0	(4,342)	0
Change in fair value and gains (losses) realized on settlements - derivative instruments	2,204	241	4,922	746
Net investment gains (losses)	$ 2,803	$ (3,486)	$ 1,884	$ (1,656)