Condensed Consolidated Balance Sheets (USD $) In Thousands	Jun. 30, 2011	Dec. 31, 2010
ASSETS
Cash and cash equivalents	$ 66,983	$ 71,127
Marketable securities	32,634	16,124
Total cash, cash equivalents, and marketable securities	99,617	87,251
Trade accounts receivable, net of allowance of $1,357 and $1,159	96,499	79,896
Deferred income taxes	4,811	4,770
Income taxes receivable	12,969	9,266
Other current assets	6,302	7,473
Total current assets	220,198	188,656
Property and equipment, net	11,845	11,010
Long-term deferred income taxes	33,868	33,769
Long-term other assets	2,850	2,905
Intangible assets, net	74,985	80,684
Goodwill	20,451	20,451
Total assets	364,197	337,475
LIABILITIES AND STOCKHOLDERS' EQUITY
Accounts payable	5,953	6,286
Accrued expenses	23,750	24,736
Accrued compensation and related expenses	25,742	27,125
Deferred revenue	76,028	56,903
Total current liabilities	131,473	115,050
Income taxes payable	6,023	5,783
Long-term deferred revenue	17,407	17,751
Other long-term liabilities	2,625	3,221
Total liabilities	157,528	141,805
Commitments and contingencies
Stockholders' equity:
Preferred stock, 1,000 shares authorized; no shares issued and outstanding
Common stock, 70,000 shares authorized; 37,535 shares and 37,250 shares issued and outstanding	375	372
Additional paid-in capital	127,056	122,607
Retained earnings	76,188	71,431
Accumulated other comprehensive income	3,050	1,260
Total stockholders' equity	206,669	195,670
Total liabilities and stockholders' equity	$ 364,197	$ 337,475