Consolidated Balance Sheets - USD ($) $ in Thousands	Jun. 30, 2015	Dec. 31, 2014
ASSETS
Cash and cash equivalents	$ 756,797	$ 869,133
Investments-available-for-sale (amortized cost: 2015-$2,374,767, 2014-$1,777,404)	2,371,540	1,791,060
Premiums receivable, net of allowance for doubtful accounts (2015-$1,646, 2014-$1,671)	434,067	951,935
Amounts receivable under government contracts	223,160	150,546
Other receivables	459,090	424,910
Deferred taxes	62,983	57,911
Assets held for sale	50,000	50,000
Other assets	501,200	220,122
Total current assets	4,858,837	4,515,617
Property and equipment, net	80,816	84,328
Goodwill	558,886	558,886
Other intangible assets, net	10,415	11,822
Deferred taxes	43,588	33,081
Investments-available-for-sale-noncurrent (amortized cost: 2015-$7,637, 2014-$5,474)	6,544	4,570
Other noncurrent assets	300,572	187,630
Total Assets	5,859,658	5,395,934
LIABILITIES AND STOCKHOLDERS’ EQUITY
Reserves for claims and other settlements	1,757,939	1,896,035
Health care and other costs payable under government contracts	75,092	71,988
Unearned premiums	190,021	96,106
Accounts payable and other liabilities	1,168,014	880,374
Total current liabilities	3,191,066	2,944,503
Senior notes payable	399,607	399,504
Borrowings under revolving credit facility	210,000	100,000
Other noncurrent liabilities	346,915	242,705
Total Liabilities	$ 4,147,588	$ 3,686,712
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 2015- 153,728 shares; 2014-152,451 shares)	154	153
Additional paid-in capital	1,481,691	1,444,705
Treasury common stock, at cost (2015-76,442 shares of common stock; 2014-74,378 shares of common stock)	(2,453,869)	(2,341,652)
Retained earnings	2,697,633	2,609,277
Accumulated other comprehensive income (loss)	(13,539)	(3,261)
Total Stockholders’ Equity	1,712,070	1,709,222
Total Liabilities and Stockholders’ Equity	$ 5,859,658	$ 5,395,934