CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Revenues
Insurance premiums and contract charges earned	$ 897,954	$ 817,333	$ 794,703
Net investment income	365,064	376,507	373,630
Net investment gains (losses)	153,340	(12,543)	(3,406)
Other income	14,127	10,302	6,623
Total revenues	1,430,485	1,191,599	1,171,550
Benefits, losses and expenses
Benefits, claims and settlement expenses	585,068	637,560	582,306
Interest credited	212,786	206,199	198,635
Operating expenses	234,609	205,413	187,789
DAC unlocking and amortization expense	109,181	109,889	102,185
Intangible asset amortization expense	8,790	0	0
Interest expense	15,577	13,001	11,948
Other expense - goodwill impairment	28,025	0	0
Total benefits, losses and expenses	1,194,036	1,172,062	1,082,863
Income before income taxes	236,449	19,537	88,687
Income tax expense (benefit)	52,006	1,194	(80,772)
Net income	$ 184,443	$ 18,343	$ 169,459
Net income per share
Basic (in usd per share)	$ 4.42	$ 0.44	$ 4.10
Diluted (in usd per share)	$ 4.40	$ 0.44	$ 4.08
Weighted average number of shares and equivalent shares
Basic (in shares)	41,737,876	41,570,492	41,364,546
Diluted (in shares)	41,948,531	41,894,232	41,564,979
Net investment gains (losses)
Total other-than-temporary impairment losses on securities	$ (1,380)	$ (1,530)	$ (12,620)
Portion of losses recognized in other comprehensive income (loss)	0	0	0
Net other-than-temporary impairment losses on securities recognized in earnings	(1,380)	(1,530)	(12,620)
Sales and other, net	151,495	3,491	7,756
Change in fair value - equity securities	7,308	(18,323)	0
Change in fair value and gains realized on settlements - derivatives	(4,083)	3,819	1,458
Total	$ 153,340	$ (12,543)	$ (3,406)