Consolidated and Condensed Balance Sheets (Unaudited) (USD $) In Thousands	Jun. 30, 2011	Dec. 31, 2010
Current assets:
Cash and cash equivalents	$ 228,358	$ 219,448
Marketable securities, current portion	9,120	8,861
Restricted cash, current portion	560	1,416
Accounts receivable, less allowance for doubtful accounts of $88 and $91 at June 30, 2011 and December 31, 2010, respectively	141,474	136,300
Unbilled revenues	76,165	49,765
Deferred tax assets, current portion	17,416	23,938
Prepaid expenses and other current assets	28,083	21,256
Total current assets	501,176	460,984
Marketable securities, net of current portion	1,290	1,269
Restricted cash, net of current portion	3,239	3,093
Property and equipment, net	49,032	35,571
Purchased intangible assets, net	15,318	17,629
Goodwill	83,415	77,865
Deferred tax assets, net of current portion	20,180	19,692
Other assets	7,950	7,619
Total assets	681,600	623,722
Current liabilities:
Accounts payable	26,800	18,714
Accrued expenses	51,257	51,444
Accrued compensation	59,025	66,609
Accrued restructuring costs	1,269	3,129
Income taxes payable	8,371	567
Deferred revenues	13,461	18,558
Total current liabilities	160,183	159,021
Long-term liabilities	24,091	22,396
Total liabilities	184,274	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 June 30, 2011 and December 31, 2010	0	0
Common stock, par value $0.01 per share, 200,000,000 shares authorized, 139,043,059 and 137,307,612 shares issued at June 30, 2011 and December 31, 2010, respectively	1,390	1,373
Additional paid-in capital	576,008	555,562
Treasury stock, at cost, 99,928 and 458,664 shares at June 30, 2011 and December 31, 2010, respectively	(537)	(2,466)
Accumulated other comprehensive loss	(7,221)	(12,488)
Accumulated deficit	(72,314)	(99,676)
Total stockholders' equity	497,326	442,305
Total liabilities and stockholders' equity	$ 681,600	$ 623,722