Condensed Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Sep. 30, 2012	Dec. 31, 2011
Current assets:
Cash and cash equivalents	$ 176,568	$ 211,122
Receivables, net	251,113	229,702
Prepaid expenses	12,842	11,540
Other current assets	20,068	20,120
Assets held for sale, discontinued operations		9,590
Total current assets	460,591	482,074
Property and equipment, net	99,411	91,080
Goodwill	204,971	121,342
Intangibles, net	96,047	44,472
Deferred charges and other assets	43,595	30,162
Total assets	904,615	769,130
Current liabilities:
Accounts payable	23,982	23,109
Accrued employee compensation and benefits	76,910	62,452
Current deferred income tax liabilities	256	663
Income taxes payable	1,581	423
Deferred revenue	37,213	34,319
Other accrued expenses and current liabilities	26,484	21,191
Liabilities held for sale, discontinued operations		7,128
Total current liabilities	166,426	149,285
Deferred grants	7,859	8,563
Long-term debt	98,000
Long-term income tax liabilities	26,374	26,475
Other long-term liabilities	14,368	11,241
Total liabilities	313,027	195,564
Commitments and loss contingency (Note 16)
Shareholders' equity:
Preferred stock, $0.01 par value, 10,000 shares authorized; no shares issued and outstanding
Common stock, $0.01 par value, 200,000 shares authorized; 43,788 and 44,306 shares issued, respectively	438	443
Additional paid-in capital	276,821	281,157
Retained earnings	301,897	291,803
Accumulated other comprehensive income	13,812	4,436
Treasury stock at cost: 106 shares and 299 shares, respectively	(1,380)	(4,273)
Total shareholders' equity	591,588	573,566
Total liabilities and shareholders' equity	$ 904,615	$ 769,130