CONDENSED CONSOLIDATED BALANCE SHEETS (USD $) In Thousands, unless otherwise specified	Sep. 30, 2014	Dec. 31, 2013
Current assets:
Cash and cash equivalents	$ 221,498	$ 178,757
Short term investments	587,226	490,177
Accounts receivable, net of allowance for doubtful accounts of $ 2,017 and $ 2,022 at September 30, 2014 and December 31, 2013, respectively	116,778	101,974
Revenue earned in excess of billings	36,567	22,275
Deferred income taxes and other current assets	67,697	49,929
Total current assets	1,029,766	843,112
Property and equipment	210,887	198,687
Less accumulated depreciation and amortization	100,058	89,082
Property and equipment, net	110,829	109,605
Goodwill	906	906
Non current term deposits with banks		163
Deferred income taxes and other non current assets	47,093	43,390
TOTAL ASSETS	1,188,594	997,176
Current liabilities:
Accounts payable	10,171	9,947
Accrued payroll and related costs	56,869	56,308
Income taxes payable	27,206	19,224
Accrued liabilities	27,889	26,714
Deferred revenue	4,372	4,729
Loans and borrowings	8,486	7,363
Total current liabilities	134,993	124,285
Other non current liabilities	14,246	11,970
Non current loans and borrowings	132,000	138,375
TOTAL LIABILITIES	281,239	274,630
Commitments and contingencies (See Note 15)
SHAREHOLDERS' EQUITY
Total shareholders' equity	907,355	722,546
TOTAL LIABILITIES AND SHAREHOLDERS' EQUITY	$ 1,188,594	$ 997,176