Consolidated Statements Of Operations (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Revenues
Health plan services premiums	$ 2,606,754	$ 2,578,689	$ 7,817,697	$ 7,818,565
Government contracts	149,342	169,811	423,796	527,421
Net investment income	11,276	16,355	57,970	63,356
Administrative services fees and other income	7,659	1,854	11,036	16,300
Divested operations and services revenue	0	12,863	0	25,668
Total revenues	2,775,031	2,779,572	8,310,499	8,451,310
Expenses
Health plan services (excluding depreciation and amortization)	2,196,561	2,281,388	6,657,215	6,983,502
Government contracts	125,334	151,815	378,209	467,531
General and administrative	267,683	222,425	804,355	688,457
Selling	59,498	61,053	175,828	181,004
Depreciation and amortization	9,402	7,907	28,355	22,722
Interest	7,973	8,021	24,626	24,895
Divested operations and services expenses	0	17,587	0	59,973
Total expenses	2,666,451	2,750,196	8,068,588	8,428,084
Income from continuing operations before income taxes	108,580	29,376	241,911	23,226
Income tax provision	41,740	8,898	91,538	5,712
Income from continuing operations	66,840	20,478	150,373	17,514
Discontinued operations:
Loss from discontinued operation, net of tax	0	0	0	(18,452)
(Adjustment to) gain on sale of discontinued operation, net of tax	0	(2,450)	0	116,990
(Loss) income on discontinued operation, net of tax	0	(2,450)	0	98,538
Net income	$ 66,840	$ 18,028	$ 150,373	$ 116,052
Net income per share—basic:
Income from continuing operations	$ 0.84	$ 0.25	$ 1.89	$ 0.21
(Loss) income on discontinued operation, net of tax	$ 0.00	$ (0.03)	$ 0.00	$ 1.20
Net income per share—basic	$ 0.84	$ 0.22	$ 1.89	$ 1.41
Net income per share—diluted:
Income from continuing operations	$ 0.83	$ 0.25	$ 1.87	$ 0.21
(Loss) income on discontinued operation, net of tax	$ 0.00	$ (0.03)	$ 0.00	$ 1.18
Net income per share—diluted	$ 0.83	$ 0.22	$ 1.87	$ 1.39
Weighted average shares outstanding:
Basic	79,432	81,607	79,436	82,451
Diluted	80,441	82,039	80,339	83,447