CONSOLIDATED BALANCE SHEETS (USD $) In Thousands, unless otherwise specified	Mar. 31, 2014	Dec. 31, 2013
Current Assets:
Cash and cash equivalents	$ 261,300	$ 203,187
Restricted cash	264,566	236,696
Accounts receivable, less allowance for doubtful accounts of $5,447 and $5,598 at December 31, 2013 and March 31, 2014, respectively	202,767	238,185
Short-term investments (restricted investments of $117,674 and $151,251 at December 31, 2013 and March 31, 2014, respectively)	181,788	175,883
Deferred income taxes	37,044	37,530
Pharmaceutical inventory	47,105	49,609
Other current assets (restricted deposits of $25,009 and $30,454 at December 31, 2013 and March 31, 2014, respectively)	62,656	48,268
Total Current Assets	1,057,226	989,358
Property and equipment, net	167,110	172,333
Restricted long-term investments	27,060	32,430
Other long-term assets	9,888	7,197
Goodwill	488,203	488,206
Other intangible assets, net	68,386	69,694
Total Assets	1,817,873	1,759,218
Current Liabilities:
Accounts payable	35,742	42,853
Accrued liabilities	173,372	134,652
Medical claims payable	240,046	228,341
Other medical liabilities	65,288	67,416
Current maturities of long-term capital lease obligations	3,040	3,005
Total Current Liabilities	517,488	476,267
Long-term capital lease obligations	22,568	23,720
Deferred income taxes	38,445	42,046
Tax contingencies	33,593	32,343
Deferred credits and other long-term liabilities	20,336	17,803
Total Liabilities	632,430	592,179
Redeemable non-controlling interest	9,214	10,554
Preferred stock, par value $.01 per share Authorized - 10,000 shares at December 31, 2013 and March 31, 2014 - Issued and outstanding - none
Other Stockholders' Equity:
Additional paid-in capital	933,274	922,325
Retained earnings	1,126,213	1,100,493
Accumulated other comprehensive loss	(50)	(93)
Ordinary common stock in treasury, at cost, 19,735 shares and 20,019 shares at December 31, 2013 and March 31, 2014, respectively	(883,684)	(866,714)
Total Stockholders' Equity	1,176,229	1,156,485
Total Liabilities, Redeemable Non-Controlling Interest and Stockholders' Equity	1,817,873	1,759,218
Ordinary common stock
Current Liabilities:
Common stock	476	474
Multi-Vote common stock
Current Liabilities:
Common stock