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CONDENSED CONSOLIDATED BALANCE SHEETS (USD $)
In Thousands, unless otherwise specified
Mar. 31, 2013
Dec. 31, 2012
Current assets:    
Cash and cash equivalents $ 34,425 $ 21,280
Short-term investments 5,535 6,584
Accounts receivable, net 263,820 248,066
Prepaid expenses 3,959 4,852
Deferred income taxes 77,631 69,034
Other assets 9,258 9,228
Total current assets 394,628 359,044
Investments 58,645 47,593
Property and equipment, net 60,275 59,738
Goodwill 2,165,169 2,165,672
Other assets, net 113,939 118,290
Total assets 2,792,656 2,750,337
Current liabilities:    
Accounts payable and accrued expenses 150,725 255,661
Current portion of long-term capital lease obligations 95 101
Income taxes payable 40,075 12,576
Total current liabilities 190,895 268,338
Line of credit 184,000 144,000
Long-term capital lease obligations 209 233
Long-term professional liabilities 126,718 119,570
Deferred income taxes 130,102 125,877
Other liabilities 54,976 56,951
Total liabilities 686,900 714,969
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; 50,169 and 50,019 shares issued and outstanding, respectively 502 500
Additional paid-in capital 803,099 788,080
Retained earnings 1,302,155 1,246,788
Total shareholders' equity 2,105,756 2,035,368
Total liabilities and shareholders' equity $ 2,792,656 $ 2,750,337