Interim Condensed Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Sep. 30, 2012	Dec. 31, 2011
Current assets:
Cash and cash equivalents	$ 21,680	$ 14,954
Short term bank deposits	68,001	55,431
Marketable securities	51,968	69,027
Trade receivables (net of allowance for doubtful accounts of $25 at both September 30, 2012 and December 31, 2011)	6,015	5,116
Deferred tax assets	1,993	2,248
Prepaid expenses and other accounts receivable	2,373	2,320
Total current assets	152,030	149,096
Long term bank deposits	14,153	25,106
Severance pay fund	5,791	5,473
Deferred tax assets	1,106	832
Property and equipment, net	1,192	1,235
Goodwill	36,498	36,498
Investment in other companies	2,433	900
Total long-term assets	61,173	70,044
Total assets	213,203	219,140
Current liabilities:
Trade payables	1,009	580
Deferred revenues	867	1,074
Accrued expenses and other payables	8,261	10,124
Income taxes payable, net	1,710	545
Deferred tax liabilities	197	290
Total current liabilities	12,044	12,613
Long term liabilities:
Accrued severance pay	5,856	5,607
Stockholders' equity:
Preferred Stock: $0.001 par value: 5,000,000 shares authorized; none issued and outstanding
Common Stock: $0.001 par value: 60,000,000 shares authorized; 22,417,873 and 23,543,746 shares issued and outstanding at September 30, 2012 and December 31, 2011, respectively	22	24
Additional paid in-capital	197,138	191,945
Treasury stock	(22,415)
Accumulated other comprehensive income (loss)	280	(901)
Retained earnings	20,278	9,852
Total stockholders' equity	195,303	200,920
Total liabilities and stockholders' equity	$ 213,203	$ 219,140