Consolidated Balance Sheets - USD ($)	Sep. 30, 2015	Dec. 31, 2014
ASSETS
Cash and cash equivalents	$ 972,908,000	$ 869,133,000
Investments-available-for-sale (amortized cost: 2015-$2,210,387, 2014-$1,777,404)	2,221,278,000	1,791,060,000
Premiums receivable, net of allowance for doubtful accounts (2015-$1,267, 2014-$1,671)	832,785,000	951,935,000
Amounts receivable under government contracts	165,073,000	150,546,000
Other receivables	430,987,000	424,910,000
Deferred taxes	76,495,000	57,911,000
Assets held for sale	0	50,000,000
Other assets	309,543,000	220,122,000
Total current assets	5,009,069,000	4,515,617,000
Property and equipment, net	139,083,000	84,328,000
Goodwill	558,886,000	558,886,000
Other intangible assets, net	9,712,000	11,822,000
Deferred taxes	16,520,000	33,081,000
Investments-available-for-sale-noncurrent (amortized cost: 2015-$23,788, 2014-$5,474)	20,064,000	4,570,000
Other noncurrent assets	270,097,000	187,630,000
Total Assets	6,023,431,000	5,395,934,000
LIABILITIES AND STOCKHOLDERS’ EQUITY
Reserves for claims and other settlements	1,684,423,000	1,896,035,000
Health care and other costs payable under government contracts	56,417,000	71,988,000
Unearned premiums	121,061,000	96,106,000
Accounts payable and other liabilities	1,486,133,000	880,374,000
Total current liabilities	3,348,034,000	2,944,503,000
Senior notes payable	399,658,000	399,504,000
Borrowings under revolving credit facility	210,000,000	100,000,000
Other noncurrent liabilities	277,922,000	242,705,000
Total Liabilities	$ 4,235,614,000	$ 3,686,712,000
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 2015-153,736 shares; 2014-152,451 shares)	154,000	153,000
Additional paid-in capital	1,489,532,000	1,444,705,000
Treasury common stock, at cost (2015-76,445 shares of common stock; 2014-74,378 shares of common stock)	(2,454,067,000)	(2,341,652,000)
Retained earnings	2,757,886,000	2,609,277,000
Accumulated other comprehensive income (loss)	(5,688,000)	(3,261,000)
Total Stockholders’ Equity	1,787,817,000	1,709,222,000
Total Liabilities and Stockholders’ Equity	$ 6,023,431,000	$ 5,395,934,000