CONSOLIDATED BALANCE SHEETS (USD $) In Thousands, unless otherwise specified	Dec. 31, 2011	Dec. 31, 2010
Current assets:
Cash and cash equivalents	$ 65,525	$ 81,948
Short-term marketable securities	69,908	70,075
Accounts receivable, net of allowance for doubtful accounts of $106 and $168, respectively	62,125	49,960
Deferred taxes, current	16,294	16,358
Prepaid expenses and other	23,660	17,864
Total current assets	237,512	236,205
Property and equipment, net	42,301	41,524
Goodwill	204,621	145,580
Other intangibles, net	49,521	19,772
Long-term marketable securities	917
Deferred taxes, long-term	30,751	33,591
Other assets	15,927	12,059
Noncurrent assets of discontinued operation	2,006	2,095
Total assets	583,556	490,826
Current liabilities:
Accounts payable	10,558	6,737
Accrued liabilities	40,029	34,080
Deferred revenues	166,945	147,896
Income taxes payable	2,972	1,691
Short-term debt	5,000
Current liabilities of discontinued operation	488	165
Total current liabilities	225,992	190,569
Deferred revenues, long-term	7,926	6,337
Long-term debt	45,000
Other long-term liabilities	16,944	14,844
Noncurrent liabilities of discontinued operation	4,633	5,228
Total liabilities	300,495	216,978
Commitments and contingencies (See Note 10)
Stockholders' equity:
Preferred stock; $0.01 par value: 2,000 shares authorized; none issued
Common stock; $0.01 par value: 120,000 shares authorized; 50,997 and 51,974 shares issued and outstanding	510	520
Additional paid-in capital	429,734	411,600
Accumulated deficit	(154,053)	(146,887)
Accumulated other comprehensive income	6,870	8,615
Total stockholders' equity	283,061	273,848
Total liabilities and stockholders' equity	$ 583,556	$ 490,826