CONSOLIDATED BALANCE SHEETS (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
Current assets:
Cash and cash equivalents	$ 58,217	$ 65,525
Short-term marketable securities	111,192	69,908
Accounts receivable, net of allowance for doubtful accounts of $110 and $106, respectively	61,069	62,125
Deferred taxes, current	18,934	16,294
Prepaid expenses and other	25,868	23,660
Current assets of discontinued operation	88
Total current assets	275,368	237,512
Property and equipment, net	37,269	42,301
Goodwill	206,932	204,621
Other intangibles, net	38,205	49,521
Long-term marketable securities	61,552	917
Deferred taxes , long-term	24,524	30,751
Other assets	12,994	15,927
Noncurrent assets of discontinued operation	1,609	2,006
Total assets	658,453	583,556
Current liabilities:
Accounts payable	5,190	10,558
Accrued liabilities	37,096	40,029
Deferred revenues	174,388	166,945
Income taxes payable	5,593	2,972
Current portion of long-term debt	10,000	5,000
Current liabilities of discontinued operation	262	488
Total current liabilities	232,529	225,992
Deferred revenues, long-term	8,787	7,926
Long-term income taxes payable	5,335	3,196
Long-term debt	85,000	45,000
Other long-term liabilities	13,139	13,748
Noncurrent liabilities of discontinued operation	3,804	4,633
Total liabilities	348,594	300,495
Commitments and contingencies (See Note 12)
Stockholders' equity:
Preferred stock; $0.01 par value: 2,000 shares authorized; none issued
Common stock; $0.01 par value: 120,000 shares authorized; 50,457 and 50,997 shares issued and outstanding	505	510
Additional paid-in capital	453,585	429,734
Accumulated deficit	(154,261)	(154,053)
Accumulated other comprehensive income	10,030	6,870
Total stockholders' equity	309,859	283,061
Total liabilities and stockholders' equity	$ 658,453	$ 583,556