CONSOLIDATED BALANCE SHEETS (USD $) In Thousands, unless otherwise specified	Mar. 31, 2013	Dec. 31, 2012
Current Assets:
Cash and cash equivalents	$ 188,421	$ 189,464
Restricted cash	221,790	226,554
Accounts receivable, less allowance for doubtful accounts of $4,612 and $5,566 at December 31, 2012 and March 31, 2013, respectively	146,376	138,253
Short-term investments (restricted investments of $88,332 and $100,780 at December 31, 2012 and March 31, 2013, respectively)	224,871	201,127
Deferred income taxes	31,636	31,698
Pharmaceutical inventory	47,731	45,727
Other current assets (restricted deposits of $20,846 and $24,968 at December 31, 2012 and March 31, 2013, respectively)	40,403	38,595
Total Current Assets	901,228	871,418
Property and equipment, net	162,611	136,548
Restricted long-term investments	25,131	32,563
Other long-term assets	9,296	9,730
Goodwill	426,939	426,939
Other intangible assets, net	32,622	34,935
Total Assets	1,557,827	1,512,133
Current Liabilities:
Accounts payable	17,589	17,081
Accrued liabilities	87,252	100,778
Medical claims payable	210,873	198,429
Other medical liabilities	80,222	76,914
Current maturities of long-term capital lease obligations	3,242
Total Current Liabilities	399,178	393,202
Long-term capital lease obligations	25,180
Deferred income taxes	32,988	34,086
Tax contingencies	61,657	60,697
Deferred credits and other long-term liabilities	7,038	6,815
Total Liabilities	526,041	494,800
Preferred stock, par value $. 01 per share Authorized-10,000 shares at December 31, 2012 and March 31, 2013-Issued and outstanding-none
Other Stockholders' Equity:
Additional paid-in capital	861,804	848,238
Retained earnings	1,003,290	975,232
Accumulated other comprehensive loss	(112)	(35)
Ordinary common stock in treasury, at cost, 18,575 and 19,114 shares at December 31, 2012 and March 31, 2013, respectively	(833,658)	(806,561)
Total Stockholders' Equity	1,031,786	1,017,333
Total Liabilities and Stockholders' Equity	1,557,827	1,512,133
Ordinary common stock
Current Liabilities:
Common stock	462	459
Multi-Vote common stock
Current Liabilities:
Common stock