CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Current assets:
Cash and cash equivalents	$ 78,332	$ 500,499
Short-term investments	21,614	540,045
Accounts receivable, net of allowance for doubtful accounts of $801 and $622 at December 31, 2016 and 2015, respectively	118,299	136,926
Revenue earned in excess of billings	25,039	30,448
Other current assets	36,306	36,423
Total current assets	279,590	1,244,341
Property and equipment	227,056	217,922
Less accumulated depreciation and amortization	120,580	112,146
Property and equipment, net	106,476	105,776
Goodwill	906	906
Non-current term deposits with banks	225	77
Deferred income taxes and other non-current assets	67,346	72,170
TOTAL ASSETS	454,543	1,423,270
Current liabilities:
Accounts payable	10,760	14,678
Accrued payroll and related costs	56,650	60,339
Income taxes payable	15,195	11,305
Accrued liabilities	20,799	23,150
Deferred revenue	7,973	7,716
Loans and borrowings	21,264	129,981
Total current liabilities	132,641	247,169
Deferred income taxes and other non-current liabilities	26,373	17,656
Non-current loans and borrowings	478,616
TOTAL LIABILITIES	637,630	264,825
Commitments and contingencies ( See Note 13 )
SHAREHOLDERS' (DEFICIT)EQUITY
Common Stock, no par value per share, 200,000,000 shares authorized; 83,634,955 and 83,947,151 shares issued and outstanding at December 31, 2016 and 2015, respectively	1	1
Restricted stock,669,554 and 465,290 shares issued and outstanding at December 31, 2016 and 2015, respectively	45,033	38,389
Treasury stock at cost 510,923 shares of common stock at December 31, 2016	(9,990)
Additional paid-in capital	67,422	67,422
Accumulated other comprehensive loss	(254,905)	(235,609)
Retained earnings(accumulated deficit)	(30,648)	1,288,242
Total shareholders' (deficit) equity	(183,087)	1,158,445
Total liabilities and shareholders' (deficit) equity	$ 454,543	$ 1,423,270