CONSOLIDATED STATEMENTS OF OPERATIONS (UNAUDITED) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Revenues
Insurance premiums and contract charges earned	$ 195,718	$ 188,360	$ 391,440	$ 373,810
Net investment income	91,994	91,179	182,705	175,838
Net realized investment gains	2,072	3,080	1,830	2,926
Other income	1,652	939	2,765	2,287
Total revenues	291,436	283,558	578,740	554,861
Benefits, losses and expenses
Benefits, claims and settlement expenses	165,879	148,408	309,975	267,921
Interest credited	49,348	47,576	98,122	94,266
Policy acquisition expenses amortized	24,808	24,587	49,694	48,639
Operating expenses	46,228	43,345	94,984	86,141
Interest expense	2,945	2,948	5,901	5,883
Total benefits, losses and expenses	289,208	266,864	558,676	502,850
Income before income taxes	2,228	16,694	20,064	52,011
Income tax (benefit) expense	(33)	4,828	2,485	14,992
Net income	$ 2,261	$ 11,866	$ 17,579	$ 37,019
Net income per share
Basic (in usd per share)	$ 0.05	$ 0.29	$ 0.43	$ 0.90
Diluted (in usd per share)	$ 0.05	$ 0.29	$ 0.42	$ 0.89
Weighted average number of shares and equivalent shares (in thousands)
Basic (in shares)	41,368	41,082	41,268	41,200
Diluted (in shares)	41,493	41,314	41,416	41,416
Net realized investment gains (losses)
Total other-than-temporary impairment losses on securities	$ (3,564)	$ (3,853)	$ (6,361)	$ (7,526)
Portion of losses recognized in other comprehensive income	0	(290)	0	(290)
Net other-than-temporary impairment losses on securities recognized in earnings	(3,564)	(3,563)	(6,361)	(7,236)
Realized investment gains, net	5,636	6,643	8,191	10,162
Total	$ 2,072	$ 3,080	$ 1,830	$ 2,926