Condensed Consolidated Balance Sheets (USD $) In Thousands	Sep. 30, 2011	Dec. 31, 2010
ASSETS
Cash and cash equivalents	$ 89,172	$ 78,505
Short term investments	212,083	208,695
Accounts receivable, net of allowances for doubtful accounts of $2,547 and $3,090 at September 30, 2011 and December 31, 2010 respectively	83,369	75,873
Revenue earned in excess of billings	15,664	5,329
Deferred income taxes and other current assets	56,615	43,705
Total current assets	456,903	412,107
Property and equipment	192,613	171,445
Less accumulated depreciation and amortization	75,282	69,338
Property and equipment, net	117,331	102,107
Goodwill	906	906
Non current Term Deposits with Banks	28	66
Deferred income taxes and other non current assets	29,163	30,931
TOTAL ASSETS	604,331	546,117
LIABILITIES AND SHAREHOLDERS' EQUITY
Accounts payable	12,366	10,071
Accrued payroll and related costs	40,377	40,736
Income taxes payable	6,226	2,291
Accrued liabilities	34,271	16,561
Deferred revenue	7,323	9,783
Dividends payable	2,741	2,752
Total current liabilities	103,304	82,194
Other non current liabilities	14,021	12,453
TOTAL LIABILITIES	117,325	94,647
SHAREHOLDERS' EQUITY
Total shareholders' equity	487,006	451,470
TOTAL LIABILITIES AND SHAREHOLDERS' EQUITY	$ 604,331	$ 546,117