Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Current Assets:
Cash and cash equivalents	$ 433,155	$ 340,110
Investments-available-for-sale (amortized cost: 2013-$1,602,456, 2012-$1,753,931)	1,567,020	1,812,512
Premiums receivable, net of allowance for doubtful accounts (2013-$643, 2012-$668)	430,012	373,269
Amounts receivable under government contracts	194,041	228,316
Other receivables	68,919	113,875
Deferred taxes	94,060	51,086
Other assets	132,683	130,796
Total current assets	2,919,890	3,049,964
Property and equipment, net	201,395	183,793
Goodwill	565,886	565,886
Other intangible assets, net	13,842	17,271
Deferred taxes	5,793	13,583
Investments-available-for-sale-noncurrent (amortized cost: 2013-$67,943, 2012-$0)	59,768	0
Other noncurrent assets	162,551	103,893
Total Assets	3,929,125	3,934,390
Current Liabilities:
Reserves for claims and other settlements	984,075	1,037,973
Health care and other costs payable under government contracts	72,098	75,649
Unearned premiums	123,969	151,048
Accounts payable and other liabilities	397,036	373,426
Total current liabilities	1,577,178	1,638,096
Senior notes payable	399,300	399,095
Borrowings under revolving credit facility	100,000	100,000
Deferred Taxes	10,409	0
Other noncurrent liabilities	213,427	240,169
Total Liabilities	2,300,314	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 2013-150,224 shares; 2012-148,727 shares )	150	149
Additional paid-in capital	1,377,624	1,329,000
Treasury common stock, at cost (2013-70,704 shares of common stock; 2012-67,426 shares of common stock)	(2,179,744)	(2,092,625)
Retained earnings	2,463,648	2,293,522
Accumulated other comprehensive income	(32,867)	26,984
Total Stockholders’ Equity	1,628,811	1,557,030
Total Liabilities and Stockholders’ Equity	$ 3,929,125	$ 3,934,390