Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Jun. 30, 2014	Dec. 31, 2013
ASSETS
Cash and cash equivalents	$ 603,097	$ 433,155
Investments-available-for-sale (amortized cost: 2014-$1,662,725, 2013-$1,602,456)	1,668,943	1,567,020
Premiums receivable, net of allowance for doubtful accounts (2014-$631, 2013-$643)	849,089	430,012
Amounts receivable under government contracts	193,043	194,041
Other receivables	183,795	68,919
Deferred taxes	81,293	94,060
Other assets	259,878	132,683
Total current assets	3,839,138	2,919,890
Property and equipment, net	209,385	201,395
Goodwill	565,886	565,886
Other intangible assets, net	13,229	13,842
Deferred taxes	9,530	5,793
Investments-available-for-sale-noncurrent (amortized cost: 2014-$808, 2013-$67,943)	652	59,768
Other noncurrent assets	139,205	162,551
Total Assets	4,777,025	3,929,125
LIABILITIES AND STOCKHOLDERS’ EQUITY
Reserves for claims and other settlements	1,488,322	984,075
Health care and other costs payable under government contracts	94,195	72,098
Unearned premiums	130,905	123,969
Accounts payable and other liabilities	496,349	397,036
Total current liabilities	2,209,771	1,577,178
Senior notes payable	399,402	399,300
Borrowings under revolving credit facility	100,000	100,000
Deferred taxes	22,376	10,409
Other noncurrent liabilities	223,595	213,427
Total Liabilities	2,955,144	2,300,314
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 2014-151,555 shares; 2013-150,224 shares)	152	150
Additional paid-in capital	1,406,768	1,377,624
Treasury common stock, at cost (2014-71,251 shares of common stock; 2013-70,704 shares of common stock)	(2,197,890)	(2,179,744)
Retained earnings	2,613,302	2,463,648
Accumulated other comprehensive loss	(451)	(32,867)
Total Stockholders’ Equity	1,821,881	1,628,811
Total Liabilities and Stockholders’ Equity	$ 4,777,025	$ 3,929,125