Condensed Consolidated Statements of Cash Flows (Unaudited) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Cash flows from operating activities:
Net income (loss)	$ 21,789	$ (4,949)
Adjustments to reconcile net income or loss to net cash provided by operating activities:
Depreciation and amortization	23,417	23,137
Amortization of premium from senior unsecured bonds	(77)	(77)
Accretion of asset retirement obligation	374	376
Stock-based compensation	1,440	1,543
Amortization of deferred lease income	(671)	(671)
Income attributable to sale of tax benefits, net of interest expense	(4,472)	(1,133)
Equity in losses of investees	197
Mark-to-market of derivative instruments	224	5,760
Gain (loss) on severance pay fund asset	17	(372)
Deferred income tax provision	5,896	3,720
Liability for unrecognized tax benefits	182	515
Deferred lease revenues	(63)	(31)
Other	(181)	(819)
Changes in operating assets and liabilities, net of amounts acquired:
Receivables	43,118	10,571
Costs and estimated earnings in excess of billings on uncompleted contracts	(6,572)	(522)
Inventories	(382)	2,411
Prepaid expenses and other	(4,074)	(144)
Deposits and other	(1,229)	(2,981)
Accounts payable and accrued expenses	(7,725)	(14,765)
Due from/to related entities, net		(24)
Billings in excess of costs and estimated earnings on uncompleted contracts	(4,086)	(3,659)
Liabilities for severance pay	341	614
Other long-term liabilities	765	(231)
Due from/to Parent	(152)	(53)
Net cash provided by operating activities	68,076	18,216
Cash flows from investing activities:
Return of investment in unconsolidated investments		(5)
Net change in restricted cash and cash equivalents	(23,341)	(48,350)
Cash received from sale of property, plant and equipment	15,000
Capital expenditures	(48,330)	(49,561)
Cash grant received from the U.S. Treasury under Section 1603 of the ARRA	21,811
Investment in unconsolidated companies	(631)	(198)
Increase (decrease) in severance pay fund asset, net of payments made to retired employees	168	(130)
Net cash used in investing activities	(35,323)	(98,244)
Cash flows from financing activities:
Proceeds from long-term loans		45,000
Proceeds from the sale of limited liability company interest in ORTP LLC		32,197
Purchase of OFC Senior Secured Notes	(12,860)	(11,888)
Proceeds from revolving credit lines with banks	887,583	597,193
Repayment of revolving credit lines with banks	(902,400)	(582,450)
Repayments of long-term debt	(10,528)	(5,195)
Cash paid to noncontrolling interest	(3,091)	(3,783)
Cash received from non-controlling interest	2,234
Deferred debt issuance costs	(391)	(47)
Cash dividends paid	(2,727)
Net cash provided by (used in) financing activities	(42,180)	71,027
Net change in cash and cash equivalents	(9,427)	(9,001)
Cash and cash equivalents at beginning of period	57,354	66,628
Cash and cash equivalents at end of period	47,927	57,627
Supplemental non-cash investing and financing activities:
Decrease in accounts payable related to purchases of property, plant and equipment	$ (5,641)	$ (4,950)