CONSOLIDATED BALANCE SHEETS (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
Current assets
Cash and cash equivalents	$ 76,329	$ 197,098
Billed receivables, net of allowances of $8,117 and $4,843, respectively	176,313	93,355
Accrued receivables	41,008	6,693
Deferred income taxes, net	34,342	25,944
Recoverable income taxes	5,572
Prepaid expenses	16,746	9,454
Other current assets	5,816	9,320
Total current assets	356,126	341,864
Property and equipment, net	41,286	20,479
Software, net	129,314	22,598
Goodwill	501,141	214,144
Other intangible assets, net	127,900	18,343
Deferred income taxes, net	63,370	13,466
Other noncurrent assets	31,749	33,748
TOTAL ASSETS	1,250,886	664,642
Current liabilities
Accounts payable	33,926	11,532
Accrued employee compensation	35,194	27,955
Current portion of term credit facility	17,500
Deferred revenue	139,863	132,995
Income taxes payable	3,542	10,427
Deferred income taxes, net	174
Alliance agreement liability		20,667
Accrued and other current liabilities	36,400	23,481
Total current liabilities	266,599	227,057
Noncurrent liabilities
Deferred revenue	51,519	32,721
Note payable under term credit facility	168,750
Note payable under revolving credit facility	188,000	75,000
Deferred income taxes, net	14,940
Other noncurrent liabilities	26,721	12,534
Total liabilities	716,529	347,312
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, 2012 and 2011
Common stock; $0.005 par value; 70,000,000 shares authorized; 46,606,796 and 40,821,516 shares issued at December 31, 2012 and 2011, respectively	232	204
Common stock warrants		24,003
Treasury stock, at cost, 7,159,023 and 7,178,427 shares outstanding at December 31, 2012 and 2011	(186,784)	(163,411)
Additional paid-in capital	534,953	322,654
Retained earnings	199,987	151,141
Accumulated other comprehensive loss	(14,031)	(17,261)
Total stockholders' equity	534,357	317,330
TOTAL LIABILITIES AND STOCKHOLDERS' EQUITY	$ 1,250,886	$ 664,642