Interim Condensed Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Mar. 31, 2012	Dec. 31, 2011
ASSETS
Cash and cash equivalents	$ 6,322	$ 14,954
Short term bank deposits	62,106	55,431
Marketable securities (see Note 3)	69,225	69,027
Trade receivables (net of allowance for doubtful accounts of $25 at both March 31, 2012 and December 31, 2011)	5,479	5,116
Deferred tax assets	1,703	2,248
Prepaid expenses and other accounts receivable	2,819	2,320
Total current assets	147,654	149,096
Long term bank deposit	25,252	25,106
Severance pay fund	5,802	5,473
Deferred tax assets	1,147	832
Property and equipment, net	1,193	1,235
Goodwill	36,498	36,498
Investment in other company	900	900
Total long-term assets	70,792	70,044
Total assets	218,446	219,140
LIABILITIES AND STOCKHOLDERS' EQUITY
Trade payables	831	580
Deferred revenues	602	1,074
Accrued expenses and other payables	10,018	10,124
Taxes payable	1,295	545
Deferred tax liabilities	138	290
Total current liabilities	12,884	12,613
Long term liabilities:
Accrued severance pay	5,957	5,607
Stockholders' equity:
$0.001 par value: 60,000,000 shares authorized; 23,198,001 and 23,543,746 shares issued and outstanding at March 31, 2012 and December 31, 2011, respectively	23	24
Additional paid in-capital	194,285	191,945
Treasury stock	(9,463)
Accumulated other comprehensive income (loss)	103	(901)
Retained earnings	14,657	9,852
Total stockholders' equity	199,605	200,920
Total liabilities and stockholders' equity	$ 218,446	$ 219,140