Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Sep. 30, 2013	Dec. 31, 2012
ASSETS
Cash and cash equivalents	$ 686,139	$ 340,110
Investments-available-for-sale (amortized cost: 2013-$1,611,091, 2012-$1,753,931)	1,580,032	1,812,512
Premiums receivable, net of allowance for doubtful accounts (2013-$763, 2012-$668)	343,502	373,269
Amounts receivable under government contracts	194,820	228,316
Other receivables	69,885	113,875
Deferred taxes	78,257	51,086
Other assets	103,685	130,796
Total current assets	3,056,320	3,049,964
Property and equipment, net	195,954	183,793
Goodwill	565,886	565,886
Other intangible assets, net	14,699	17,271
Deferred taxes	3,394	13,583
Investments-available-for-sale-noncurrent (amortized cost: 2013-$60,080, 2012-$0)	52,637	0
Other noncurrent assets	152,611	103,893
Total Assets	4,041,501	3,934,390
LIABILITIES AND STOCKHOLDERS’ EQUITY
Reserves for claims and other settlements	990,195	1,037,973
Health care and other costs payable under government contracts	55,532	75,649
Unearned premiums	129,081	151,048
Accounts payable and other liabilities	544,704	373,426
Total current liabilities	1,719,512	1,638,096
Senior notes payable	399,248	399,095
Borrowings under revolving credit facility	100,000	100,000
Deferred taxes	1,746	0
Other noncurrent liabilities	220,404	240,169
Total Liabilities	2,440,910	2,377,360
Commitments and contingencies
Stockholders’ Equity:
Preferred stock ($0.001 par value, 10,000 shares authorized, none issued and outstanding)	0	0
Common stock ($0.001 par value, 350,000 shares authorized; issued 2013-150,193 shares; 2012-148,727 shares )	150	149
Additional paid-in capital	1,370,744	1,329,000
Treasury common stock, at cost (2013-70,696 shares of common stock; 2012-67,426 shares of common stock)	(2,179,503)	(2,092,625)
Retained earnings	2,443,895	2,293,522
Accumulated other comprehensive income	(34,695)	26,984
Total Stockholders’ Equity	1,600,591	1,557,030
Total Liabilities and Stockholders’ Equity	$ 4,041,501	$ 3,934,390