CONSOLIDATED BALANCE SHEETS (USD $) In Thousands, unless otherwise specified	Dec. 31, 2011	Dec. 31, 2010
Current assets
Cash and cash equivalents	$ 197,098	$ 171,310
Billed receivables, net of allowances of $4,843 and $5,738, respectively	93,355	77,773
Accrued receivables	6,693	9,578
Deferred income taxes, net	25,944	12,317
Prepaid expenses	9,454	13,369
Other current assets	9,320	10,462
Total current assets	341,864	294,809
Property and equipment, net	20,479	18,539
Software, net	22,598	25,366
Goodwill	214,144	203,935
Other intangible assets, net	18,343	20,448
Deferred income taxes, net	13,466	28,143
Other noncurrent assets	33,748	10,289
TOTAL ASSETS	664,642	601,529
Current liabilities
Accounts payable	11,532	15,263
Accrued employee compensation	27,955	26,174
Deferred revenue	132,995	121,936
Income taxes payable	10,427	6,181
Alliance agreement liability	20,667	1,917
Note payable under credit facility		75,000
Accrued and other current liabilities	23,481	24,293
Total current liabilities	227,057	270,764
Deferred revenue	32,721	31,045
Note payable under credit facility	75,000
Alliance agreement noncurrent liability		20,667
Other noncurrent liabilities	12,534	23,430
Total liabilities	347,312	345,906
Commitments and contingencies (Note 16)
Stockholders' equity
Preferred stock; $0.01 par value; 5,000,000 shares authorized; no shares issued and outstanding at December 31, 2011 and 2010
Common stock; $0.005 par value; 70,000,000 shares authorized; 40,821,516 shares issued at December 31, 2011 and 2010	204	204
Common stock warrants	24,003	24,003
Treasury stock, at cost, 7,178,427 and 7,548,752 shares outstanding at December 31, 2011 and 2010	(163,411)	(171,676)
Additional paid-in capital	322,654	312,947
Retained earnings	151,141	105,289
Accumulated other comprehensive loss	(17,261)	(15,144)
Total stockholders' equity	317,330	255,623
TOTAL LIABILITIES AND STOCKHOLDERS' EQUITY	$ 664,642	$ 601,529