Condensed Consolidated Balance Sheets (Unaudited) (USD $)	Jun. 30, 2013		Dec. 31, 2012
Current assets:
Cash and cash equivalents	$ 28,893,000		$ 66,628,000
Short-term bank deposit	3,021,000		3,010,000
Restricted cash, cash equivalents and marketable securities (all related to variable interest entities ("VIEs"))	85,512,000		76,537,000
Receivables:
Trade	67,545,000		55,680,000
Related entity	419,000		373,000
Other	12,191,000		8,632,000
Due from Parent	468,000		311,000
Inventories	17,906,000		20,669,000
Costs and estimated earnings in excess of billings on uncompleted contracts	16,323,000		9,613,000
Deferred income taxes	368,000		637,000
Prepaid expenses and other	35,839,000		34,144,000
Total current assets	268,485,000		276,234,000
Unconsolidated investments	3,524,000		2,591,000
Deposits and other	38,361,000		36,187,000
Deferred income taxes	17,729,000		21,283,000
Deferred charges	34,705,000		35,351,000
Property, plant and equipment, net ($1,367,078 and $1,188,721 related to VIEs, respectively)	1,415,163,000		1,252,873,000
Construction-in-process ($87,820 and $253,775 related to VIEs, respectively)	295,635,000		396,141,000
Deferred financing and lease costs, net	30,437,000		31,371,000
Intangible assets, net	33,861,000		35,492,000
Total assets	2,137,900,000	[1]	2,087,523,000
Current liabilities:
Accounts payable and accrued expenses	90,651,000		98,001,000
Deferred income taxes	20,428,000		20,392,000
Billings in excess of costs and estimated earnings on uncompleted contracts	10,970,000		25,408,000
Limited and non-recourse (all related to VIEs):
Senior secured notes	39,568,000		28,231,000
Other loans	18,214,000		11,453,000
Full recourse	28,760,000		28,649,000
Total current liabilities	208,591,000		212,134,000
Limited and non-recourse (all related to VIEs):
Senior secured notes	288,001,000		312,926,000
Other loans	277,349,000		242,815,000
Full recourse:
Senior unsecured bonds (plus unamortized premium based upon 7% of $1,283)	250,751,000		250,904,000
Other loans	67,934,000		82,344,000
Revolving credit lines with banks	80,247,000		73,606,000
Liability associated with sale of tax benefits	70,479,000		51,126,000
Deferred lease income	64,938,000		66,398,000
Deferred income taxes	49,688,000		45,059,000
Liability for unrecognized tax benefits	8,354,000		7,280,000
Liabilities for severance pay	22,883,000		22,887,000
Asset retirement obligation	20,047,000		19,289,000
Other long-term liabilities	4,923,000		5,148,000
Total liabilities	1,414,185,000		1,391,916,000
Commitments and contingencies (Note 10)
The Company's stockholders' equity:
Common stock, par value $0.001 per share; 200,000,000 shares authorized; 45,430,886 shares issued and outstanding as of June 30, 2013 and December 31, 2012	46,000		46,000
Additional paid-in capital	734,997,000		732,140,000
Accumulated deficit	(24,200,000)		(44,326,000)
Accumulated other comprehensive income	567,000		651,000
	711,410,000		688,511,000
Noncontrolling interest	12,305,000		7,096,000
Total equity	723,715,000		695,607,000
Total liabilities and equity	2,137,900,000		2,087,523,000
Variable Interest Entity, Primary Beneficiary [Member]
Receivables:
Property, plant and equipment, net ($1,367,078 and $1,188,721 related to VIEs, respectively)	1,367,078,000		1,188,721,000
Construction-in-process ($87,820 and $253,775 related to VIEs, respectively)	$ 87,820,000		$ 253,775,000

[1] Including unconsolidated investments