Consolidated and Condensed Balance Sheets (Unaudited) (USD $) In Thousands	Sep. 30, 2011	Dec. 31, 2010
Current assets:
Cash and cash equivalents	$ 155,294	$ 219,448
Marketable securities, current portion	8,387	8,861
Restricted cash, current portion	266	1,416
Accounts receivable, less allowance for doubtful accounts of $141 and $91 at September 30, 2011 and December 31, 2010, respectively	145,846	136,300
Unbilled revenues	77,109	49,765
Deferred tax assets, current portion	16,229	23,938
Prepaid expenses and other current assets	26,730	21,256
Total current assets	429,861	460,984
Marketable securities, net of current portion	1,290	1,269
Restricted cash, net of current portion	3,779	3,093
Property and equipment, net	53,160	35,571
Purchased intangible assets, net	39,666	17,629
Goodwill	108,672	77,865
Deferred tax assets, net of current portion	20,262	19,692
Other assets	8,764	7,619
Total assets	665,454	623,722
Current liabilities:
Accounts payable	30,557	18,714
Accrued expenses	39,620	51,444
Accrued compensation	71,715	66,609
Accrued restructuring costs, current portion	1,179	3,129
Income taxes payable	9,960	567
Deferred revenues	18,056	18,558
Total current liabilities	171,087	159,021
Accrued restructuring costs, net of current portion	436	0
Other long-term liabilities	40,983	22,396
Total liabilities	212,506	181,417
Commitments and contingencies (Note 6)
Stockholders' equity:
Preferred stock, par value $0.01 per share, 5,000,000 shares authorized and none issued or outstanding at September 30, 2011 and December 31, 2010
Common stock, par value $0.01 per share, 200,000,000 shares authorized, 139,845,592 and 137,307,612 shares issued at September 30, 2011 and December 31, 2010, respectively	1,399	1,373
Additional paid-in capital	527,192	555,562
Treasury stock, at cost, 99,928 and 458,664 shares at September 30, 2011 and December 31, 2010, respectively	(537)	(2,466)
Accumulated other comprehensive loss	(21,894)	(12,488)
Accumulated deficit	(53,212)	(99,676)
Total stockholders' equity	452,948	442,305
Total liabilities and stockholders' equity	$ 665,454	$ 623,722