Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Current assets:
Cash and cash equivalents	$ 178,757	$ 94,622
Short-term investments	490,177	326,653
Accounts receivable, net of allowance for doubtful accounts of $2,022 and $2,168 at December 31, 2013 and 2012, respectively	101,974	86,004
Revenue earned in excess of billings	22,275	11,875
Deferred income taxes and other current assets	49,929	51,736
Total current assets	843,112	570,890
Property and equipment	198,687	204,151
Less accumulated depreciation and amortization	89,082	85,033
Property and equipment, net	109,605	119,118
Goodwill	906	906
Non current term deposits with banks	163	14
Deferred income taxes and other non current assets	43,390	34,908
Total assets	997,176	725,836
Current liabilities:
Accounts payable	9,947	11,306
Accrued payroll and related costs	56,308	49,889
Income taxes payable	19,224	8,873
Accrued liabilities	26,714	23,644
Deferred revenue	4,729	4,694
Loans and borrowings	7,363	50,029
Total current liabilities	124,285	148,435
Other non current liabilities	11,970	11,731
Non current loans and borrowings	138,375	0
TOTAL LIABILITIES	274,630	160,166
Commitments and contingencies (See Note 13)
SHAREHOLDERS' EQUITY
Common Stock, no par value per share, 100,000,000 shares authorized; 41,757,018 and 41,659,778 shares issued and outstanding at December 31, 2013 and 2012, respectively	1	1
Restricted stock, 250,646 and 260,859 shares issued and outstanding at December 31, 2013 and 2012, respectively	23,450	18,062
Additional paid-in capital	67,422	67,422
Accumulated other comprehensive loss	(154,303)	(86,133)
Retained earnings	785,976	566,318
Total shareholders' equity	722,546	565,670
Total liabilities and shareholders' equity	$ 997,176	$ 725,836