Consolidated Balance Sheets (USD $)	Dec. 31, 2014		Dec. 31, 2013
Current assets:
Cash and cash equivalents	$ 40,230,000		$ 57,354,000
Restricted cash and cash equivalents (all related to VIEs)	93,248,000		51,065,000
Receivables:
Trade	48,609,000		95,365,000
Related entity	451,000		442,000
Other	10,141,000		11,049,000
Due from Parent	1,337,000		442,000
Inventories	16,930,000		22,289,000
Costs and estimated earnings in excess of billings on uncompleted contracts	27,793,000		21,217,000
Deferred income taxes	251,000		523,000
Prepaid expenses and other	34,884,000		29,654,000
Total current assets	273,874,000		289,340,000
Unconsolidated investments	(3,617,000)		7,076,000
Deposits and other	20,044,000		22,114,000
Deferred income taxes			891,000
Deferred charges	37,567,000		36,738,000
Property, plant and equipment, net ($1,339,342 and $1,381,083 related to VIEs, respectively)	1,437,637,000		1,452,336,000
Construction-in-process ($162,006 and $136,947 related to VIEs, respectively)	296,722,000		288,827,000
Deferred financing and lease costs, net	27,057,000		30,178,000
Intangible assets, net	28,655,000		31,933,000
Total assets	2,121,556,000	[1]	2,159,433,000	[1]
Current liabilities:
Accounts payable and accrued expenses	88,276,000		98,047,000
Deferred income taxes	974,000
Short term revolving credit lines with banks (full recourse)	20,300,000
Billings in excess of costs and estimated earnings on uncompleted contracts	24,724,000		7,903,000
Limited and non-recourse (all related to VIEs):
Senior secured notes	34,368,000		31,137,000
Other loans	17,995,000		20,377,000
Full recourse	19,116,000		28,875,000
Total current liabilities	205,753,000		186,339,000
Limited and non-recourse (all related to VIEs):
Senior secured notes	360,366,000		270,310,000
Other loans	264,625,000		311,078,000
Full recourse:
Senior unsecured bonds (plus unamortized premium based upon 7% of $820)	250,289,000		250,596,000
Other loans	34,351,000		53,467,000
Revolving credit lines with banks (full recourse)			112,017,000
Unconsolidated investments	3,617,000		(7,076,000)
Liability associated with sale of tax benefits	39,021,000		60,985,000
Deferred lease income	60,560,000		63,496,000
Deferred income taxes	66,220,000		55,035,000
Liability for unrecognized tax benefits	7,511,000		4,950,000
Liabilities for severance pay	20,399,000		23,841,000
Asset retirement obligation	19,142,000		18,679,000
Other long-term liabilities	2,956,000		3,529,000
Total liabilities	1,334,810,000		1,414,322,000
Commitments and contingencies (Note 22)
The Company's stockholders' equity:
Common stock, par value $0.001 per share; 200,000,000 shares authorized; 45,537,162 and 45,460,653 shares issued and outstanding as of December 31, 2014 and 2013 , respectively	46,000		46,000
Additional paid-in capital	742,006,000		735,295,000
Retained earnings	41,539,000		(3,088,000)
Accumulated other comprehensive income	(8,668,000)		487,000
	774,923,000		732,740,000
Noncontrolling interest	11,823,000		12,371,000
Total equity	786,746,000		745,111,000
Total liabilities and equity	2,121,556,000		2,159,433,000
Variable Interest Entity, Primary Beneficiary [Member]
Receivables:
Property, plant and equipment, net ($1,339,342 and $1,381,083 related to VIEs, respectively)	1,339,342,000		1,381,083,000
Construction-in-process ($162,006 and $136,947 related to VIEs, respectively)	$ 162,006,000		$ 136,947,000

[1] Including unconsolidated investments