Consolidated Statements of Operations (Unaudited) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Revenues
Insurance premiums and contract charges earned	$ 171,561	$ 166,335	$ 340,719	$ 331,839
Net investment income	77,361	76,334	154,764	152,009
Net realized investment gains	15,417	9,905	22,279	10,298
Other income	1,298	1,652	2,406	4,703
Total revenues	265,637	254,226	520,168	498,849
Benefits, losses and expenses
Benefits, claims and settlement expenses	120,765	130,984	233,464	238,862
Interest credited	42,098	40,454	83,506	80,433
Policy acquisition expenses amortized	23,000	22,302	43,074	40,132
Operating expenses	39,014	38,577	77,832	76,427
Interest expense	3,549	3,554	7,103	7,110
Total benefits, losses and expenses	228,426	235,871	444,979	442,964
Income before income taxes	37,211	18,355	75,189	55,885
Income tax expense	11,216	5,252	22,182	16,111
Net income	25,995	13,103	53,007	39,774
Net income per share
Basic	$ 0.65	$ 0.33	$ 1.34	$ 1.00
Diluted	$ 0.63	$ 0.32	$ 1.29	$ 0.96
Weighted average number of shares and equivalent shares (in thousands)
Basic	39,768	39,544	39,648	39,669
Diluted	41,395	41,304	41,219	41,414
Net realized investment gains
Total other-than-temporary impairment losses on securities	(963)	0	(963)	0
Portion of losses recognized in other comprehensive income	0	0	0	0
Net other-than-temporary impairment losses on securities recognized in earnings	(963)	0	(963)	0
Realized gains, net	16,380	9,905	23,242	10,298
Total	$ 15,417	$ 9,905	$ 22,279	$ 10,298