CONDENSED CONSOLIDATED BALANCE SHEETS (USD $) In Thousands, unless otherwise specified	Sep. 30, 2013	Dec. 31, 2012
Current assets
Cash and cash equivalents	$ 44,697	$ 40,013
Investments	0	2,201
Accounts receivable, net of allowance for doubtful accounts of $2,201 and $2,095	24,945	29,030
Deferred income taxes—current	864	1,609
Income taxes receivable	573	0
Prepaid and other current assets	3,036	3,084
Total current assets	74,115	75,937
Fixed assets, net	14,949	11,158
Acquired intangible assets, net	68,197	62,755
Goodwill	212,506	202,944
Deferred financing costs, net of accumulated amortization of $312 and $131	896	1,078
Other assets	456	358
Total assets	371,119	354,230
Current liabilities
Accounts payable and accrued expenses	20,774	16,552
Deferred revenue	69,389	69,404
Current portion of acquisition related contingencies	5,807	4,926
Income taxes payable	0	3,817
Total current liabilities	95,970	94,699
Long-term debt	60,000	46,000
Deferred income taxes—non-current	14,739	14,414
Accrual for unrecognized tax benefits	2,376	2,502
Acquisition related contingencies	8,833	4,830
Other long-term liabilities	1,229	1,147
Total liabilities	183,147	163,592
Commitments and contingencies (Note 8)
Stockholders' equity
Convertible preferred stock, $.01 par value, authorized 20,000 shares; no shares issued and outstanding	0	0
Common stock, $.01 par value, authorized 240,000; issued 73,249 and 71,047 shares, respectively; outstanding: 57,102 and 58,958 shares, respectively	732	710
Additional paid-in capital	306,471	294,747
Accumulated other comprehensive loss	(9,938)	(9,294)
Accumulated earnings	38,692	16,586
Treasury stock, 16,147 and 12,090 shares, respectively	(147,985)	(112,111)
Total stockholders’ equity	187,972	190,638
Total liabilities and stockholders’ equity	$ 371,119	$ 354,230