Consolidated Statements Of Operations (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
Health plan services premiums	$ 2,578,874	$ 2,618,927	$ 5,210,943	$ 5,239,876
Government contracts	139,942	176,248	274,454	357,610
Net investment income	17,143	24,697	46,694	47,001
Administrative services fees and other income	2,472	8,662	3,377	14,446
Divested operations and services revenue	0	12,805	0	12,805
Total revenues	2,738,431	2,841,339	5,535,468	5,671,738
Expenses
Health plan services (excluding depreciation and amortization)	2,191,918	2,358,455	4,460,654	4,702,114
Government contracts	127,400	153,406	252,875	315,716
General and administrative	291,437	228,756	536,672	466,032
Selling	57,769	58,390	116,330	119,951
Depreciation and amortization	9,514	7,385	18,953	14,815
Interest	8,365	8,246	16,653	16,874
Divested operations and services expenses	0	19,290	0	42,386
Total expenses	2,686,403	2,833,928	5,402,137	5,677,888
Income (loss) from continuing operations before income taxes	52,028	7,411	133,331	(6,150)
Income tax provision (benefit)	18,545	2,241	49,798	(3,186)
Income (loss) from continuing operations	33,483	5,170	83,533	(2,964)
Discontinued operations:
Loss from discontinued operation, net of tax	0	0	0	(18,452)
Gain on sale of discontinued operation, net of tax	0	119,440	0	119,440
Income on discontinued operation, net of tax	0	119,440	0	100,988
Net income	$ 33,483	$ 124,610	$ 83,533	$ 98,024
Net income per share—basic:
Income (loss) from continuing operations	$ 0.42	$ 0.06	$ 1.05	$ (0.04)
Income on discontinued operation, net of tax	$ 0.00	$ 1.44	$ 0.00	$ 1.22
Net income per share—basic	$ 0.42	$ 1.50	$ 1.05	$ 1.18
Net income per share—diluted:
Income (loss) from continuing operations	$ 0.42	$ 0.06	$ 1.04	$ (0.04)
Income on discontinued operation, net of tax	$ 0.00	$ 1.42	$ 0.00	$ 1.20
Net income per share—diluted	$ 0.42	$ 1.48	$ 1.04	$ 1.16
Weighted average shares outstanding:
Basic	79,367	83,255	79,438	82,882
Diluted	80,085	84,037	80,287	84,160