CONDENSED CONSOLIDATED BALANCE SHEETS (USD $) In Thousands, unless otherwise specified	Jun. 30, 2013	Dec. 31, 2012
Current assets
Cash and cash equivalents	$ 107,741	$ 76,329
Billed receivables, net of allowances of $10,035 and $8,117, respectively	165,450	176,313
Accrued receivables	37,038	41,008
Deferred income taxes, net	69,974	34,342
Recoverable income taxes	3,974	5,572
Prepaid expenses	19,305	16,746
Other current assets	14,433	5,816
Total current assets	417,915	356,126
Property and equipment, net	47,862	41,286
Software, net	177,836	129,314
Goodwill	625,990	501,141
Other intangible assets, net	193,814	127,900
Deferred income taxes, net	31,029	63,370
Other noncurrent assets	39,278	31,749
TOTAL ASSETS	1,533,724	1,250,886
Current liabilities
Accounts payable	43,691	33,926
Accrued employee compensation	37,047	35,194
Current portion of term credit facility	56,250	17,500
Deferred revenue	149,319	139,863
Income taxes payable	3,590	3,542
Deferred income taxes, net	214	174
Accrued and other current liabilities	31,398	36,400
Total current liabilities	321,509	266,599
Noncurrent liabilities
Deferred revenue	59,799	51,519
Note payable under term credit facility	416,875	168,750
Note payable under revolving credit facility	188,000	188,000
Deferred income taxes, net	12,952	14,940
Other noncurrent liabilities	26,170	26,721
Total liabilities	1,025,305	716,529
Commitments and contingencies (Note 14)
Stockholders' equity
Preferred stock; $0.01 par value; 5,000,000 shares authorized; no shares issued and outstanding at June 30, 2013 and December 31, 2012
Common stock; $0.005 par value; 70,000,000 shares authorized; 46,606,796 shares issued at June 30, 2013 and December 31, 2012	232	232
Treasury stock, at cost, 7,038,613 and 7,159,023 shares at June 30, 2013 and December 31, 2012, respectively	(192,778)	(186,784)
Additional paid-in capital	535,167	534,953
Retained earnings	199,702	199,987
Accumulated other comprehensive loss	(33,904)	(14,031)
Total stockholders' equity	508,419	534,357
TOTAL LIABILITIES AND STOCKHOLDERS' EQUITY	$ 1,533,724	$ 1,250,886