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Condensed Consolidated Balance Sheets (USD $)
In Thousands, unless otherwise specified
Sep. 30, 2013
Dec. 31, 2012
Current assets:    
Cash and cash equivalents $ 16,242 $ 21,280
Short-term investments 4,920 6,584
Accounts receivable, net 272,814 248,066
Prepaid expenses 6,076 4,852
Deferred income taxes 63,496 69,034
Other assets 9,415 9,228
Total current assets 372,963 359,044
Investments 61,810 47,593
Property and equipment, net 60,931 59,738
Goodwill 2,354,189 2,165,672
Other assets, net 129,972 118,290
Total assets 2,979,865 2,750,337
Current liabilities:    
Accounts payable and accrued expenses 256,596 255,661
Current portion of long-term capital lease obligations 99 101
Income taxes payable 17,299 12,576
Total current liabilities 273,994 268,338
Line of credit 123,500 144,000
Long-term capital lease obligations 159 233
Long-term professional liabilities 136,919 119,570
Deferred income taxes 147,883 125,877
Other liabilities 63,316 56,951
Total liabilities 745,771 714,969
Commitments and contingencies      
Shareholders' equity:    
Preferred stock; $.01 par value; 1,000 shares authorized; none issued      
Common stock; $.01 par value; 100,000 shares authorized; 50,247 and 50,019 shares issued and outstanding, respectively 502 500
Additional paid-in capital 828,543 788,080
Retained earnings 1,405,049 1,246,788
Total shareholders' equity 2,234,094 2,035,368
Total liabilities and shareholders' equity $ 2,979,865 $ 2,750,337