Consolidated Statements of Operations (USD $) In Thousands, except Per Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Revenues
Health plan services premiums	$ 10,459,098	$ 9,878,687	$ 9,492,460
Government contracts	689,121	1,416,619	3,344,483
Net investment income	82,434	74,161	71,181
Administrative service fees and other income	17,968	11,523	21,126
Divested operations and services revenue	40,471	34,446	186,167
Total revenues	11,289,092	11,415,436	13,115,417
Expenses
Health plan services (excluding depreciation and amortization)	9,316,313	8,539,754	8,219,832
Government contracts	605,074	1,237,884	3,168,160
General and administrative	939,940	1,052,458	877,606
Selling	245,925	237,562	238,030
Depreciation and amortization	31,146	31,152	33,400
Interest	33,220	32,131	34,880
Divested operations and services expenses	85,824	163,546	295,324
Adjustment to loss on sale of Northeast health plan subsidiaries	0	(40,815)	(41,959)
Asset impairments	0	0	6,000
Early debt extinguishment charge	0	0	3,532
Total expenses	11,257,442	11,253,672	12,834,805
Income (loss) from operations before income taxes	31,650	161,764	280,612
Income tax provision	5,969	100,708	108,727
Income from continuing operations	25,681	61,056	171,885
(Loss) income from discontinued operation, net of tax	(18,452)	11,064	32,358
Gain on sale of discontinued operation, net of tax	114,834	0	0
Income on discontinued operation, net of tax	96,382	11,064	32,358
Net income (loss)	$ 122,063	$ 72,120	$ 204,243
Net income per share - basic:
Income from continuing operations	$ 0.31	$ 0.69	$ 1.75
Income on discontinued operation, net of tax	$ 1.18	$ 0.12	$ 0.33
Net income per share - basic	$ 1.49	$ 0.81	$ 2.08
Net income per share - diluted:
Income from continuing operations	$ 0.31	$ 0.68	$ 1.73
Income on discontinued operation, net of tax	$ 1.16	$ 0.12	$ 0.33
Net income per share - diluted	$ 1.47	$ 0.80	$ 2.06
Weighted average shares outstanding:
Basic	82,158	88,524	98,232
Diluted	83,112	89,970	99,232