Consolidated Statements of Operations (Unaudited) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
Revenues
Insurance premiums and contract charges earned	$ 167,904	$ 167,035	$ 499,743	$ 500,066
Net investment income	76,649	71,550	228,658	213,708
Net realized investment gains	10,762	21,121	21,060	32,674
Other income	1,233	1,127	5,936	4,209
Total revenues	256,548	260,833	755,397	750,657
Benefits, losses and expenses
Benefits, claims and settlement expenses	106,051	124,412	344,913	398,822
Interest credited	41,411	39,288	121,844	114,987
Policy acquisition expenses amortized	20,406	25,008	60,538	64,735
Operating expenses	37,955	36,030	114,382	109,005
Interest expense	3,556	3,474	10,666	10,428
Total benefits, losses and expenses.	209,379	228,212	652,343	697,977
Income before income taxes	47,169	32,621	103,054	52,680
Income tax expense	14,903	8,984	31,014	15,087
Net income	32,266	23,637	72,040	37,593
Net income per share
Basic	$ 0.82	$ 0.59	$ 1.82	$ 0.94
Diluted	$ 0.78	$ 0.57	$ 1.74	$ 0.91
Weighted average number of shares and equivalent shares (in thousands)
Basic	39,381	39,919	39,572	39,854
Diluted	41,138	41,451	41,295	41,455
Net realized investment gains
Total other-than-temporary impairment losses on securities
Portion of losses recognized in other comprehensive income
Net other-than-temporary impairment losses on securities recognized in earnings
Net realized gains	10,762	21,121	21,060	32,674
Total	$ 10,762	$ 21,121	$ 21,060	$ 32,674