Condensed Consolidated Balance Sheets (USD $) In Thousands	Jun. 30, 2011	Dec. 31, 2010
Current assets:
Cash and cash equivalents	$ 1,567,824	$ 1,673,137
Investment securities	7,609,737	6,872,767
Receivables, less allowance for doubtful accounts of $80,195 in 2011 and $51,470 in 2010:	1,546,392	959,018
Securities lending invested collateral	29,737	49,636
Other current assets	721,537	583,141
Total current assets	11,475,227	10,137,699
Property and equipment, net	822,611	815,337
Long-term investment securities	1,592,919	1,499,672
Goodwill	2,577,511	2,567,809
Other long-term assets	1,126,637	1,082,736
Total assets	17,594,905	16,103,253
Current liabilities:
Benefits payable	3,953,185	3,469,306
Trade accounts payable and accrued expenses	1,944,897	1,624,832
Book overdraft	217,287	409,385
Securities lending payable	35,536	55,693
Unearned revenues	204,859	185,410
Total current liabilities	6,355,764	5,744,626
Long-term debt	1,664,015	1,668,849
Future policy benefits payable	1,560,668	1,492,855
Other long-term liabilities	427,741	272,867
Total liabilities	10,008,188	9,179,197
Commitments and contingencies
Stockholders' equity:
Preferred stock, $1 par; 10,000,000 shares authorized; none issued	0	0
Common stock, $0.16 2/3 par; 300,000,000 shares authorized; 192,739,787 shares issued at June 30, 2011 and 190,244,741 shares issued at December 31, 2010	32,123	31,707
Capital in excess of par value	1,897,852	1,737,207
Retained earnings	6,262,943	5,529,001
Accumulated other comprehensive income	189,030	120,584
Treasury stock, at cost, 25,910,263 shares at June 30, 2011 and 21,795,051 shares at December 31, 2010	(795,231)	(494,443)
Total stockholders' equity	7,586,717	6,924,056
Total liabilities and stockholders' equity	$ 17,594,905	$ 16,103,253