CONDENSED CONSOLIDATED BALANCE SHEETS (USD $) In Thousands, unless otherwise specified	Jun. 30, 2012	Dec. 31, 2011
Current assets:
Cash and cash equivalents	$ 54,827	$ 60,353
Marketable securities	48,037	51,079
Total cash, cash equivalents, and marketable securities	102,864	111,432
Trade accounts receivable, net of allowance of $1,165 and $926	92,542	98,293
Deferred income taxes	9,827	9,826
Income taxes receivable	10,035	7,545
Other current assets	5,512	4,865
Total current assets	220,780	231,961
Property and equipment, net	28,175	14,458
Long-term deferred income taxes	43,581	43,286
Long-term other assets	1,782	2,186
Intangible assets, net	63,787	69,369
Goodwill	20,451	20,451
Total assets	378,556	381,711
Current liabilities:
Accounts payable	7,405	10,899
Accrued expenses	21,597	18,336
Accrued compensation and related expenses	26,240	39,170
Deferred revenue	79,358	73,840
Total current liabilities	134,600	142,245
Income taxes payable	9,633	9,547
Long-term deferred revenue	11,898	15,367
Other long-term liabilities	10,813	5,796
Total liabilities	166,944	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; 37,890 shares and 37,712 shares issued and outstanding	379	377
Additional paid-in capital	133,057	129,701
Retained earnings	76,547	77,029
Accumulated other comprehensive income	1,629	1,649
Total stockholders' equity	211,612	208,756
Total liabilities and stockholders' equity	$ 378,556	$ 381,711