CONDENSED CONSOLIDATED BALANCE SHEETS (USD $) In Thousands, unless otherwise specified	Sep. 30, 2012	Dec. 31, 2011
Current assets:
Cash and cash equivalents	$ 66,237	$ 60,353
Marketable securities	45,092	51,079
Total cash, cash equivalents, and marketable securities	111,329	111,432
Trade accounts receivable, net of allowance of $1,274 and $926	80,849	98,293
Deferred income taxes	9,823	9,826
Income taxes receivable	10,776	7,545
Other current assets	6,276	4,865
Total current assets	219,053	231,961
Property and equipment, net	31,285	14,458
Long-term deferred income taxes	43,835	43,286
Long-term other assets	1,767	2,186
Intangible assets, net	61,009	69,369
Goodwill	20,451	20,451
Total assets	377,400	381,711
Current liabilities:
Accounts payable	4,548	10,899
Accrued expenses	17,311	18,336
Accrued compensation and related expenses	26,779	39,170
Deferred revenue	74,784	73,840
Total current liabilities	123,422	142,245
Income taxes payable	9,113	9,547
Long-term deferred revenue	17,423	15,367
Other long-term liabilities	14,394	5,796
Total liabilities	164,352	172,955
Commitments and contingencies
Stockholders' equity:
Preferred stock, 1,000 shares authorized; no shares issued and outstanding
Common stock, 100,000 shares and 70,000 shares authorized; 37,900 shares and 37,712 shares issued and outstanding	379	377
Additional paid-in capital	134,614	129,701
Retained earnings	75,078	77,029
Accumulated other comprehensive income	2,977	1,649
Total stockholders' equity	213,048	208,756
Total liabilities and stockholders' equity	$ 377,400	$ 381,711