Consolidated Balance Sheets - USD ($) $ in Thousands		Dec. 31, 2017	Dec. 31, 2016
Current assets:
Cash and cash equivalents		$ 47,818	$ 230,214
Restricted cash and cash equivalents		48,825	34,262
Receivables:
Trade		110,410	80,807
Other		13,828	17,482
Inventories		19,551	12,000
Costs and estimated earnings in excess of billings on uncompleted contracts		40,945	52,198
Prepaid expenses and other		40,269	45,867
Total current assets		321,646	472,830
Investment in an unconsolidated company		34,084
Deposits and other		21,599	18,553
Deferred income taxes		57,337
Deferred charges		49,834	43,773
Property, plant and equipment, net		1,734,691	1,556,378
Construction-in-process		293,542	306,709
Deferred financing and lease costs, net		4,674	3,923
Intangible assets, net		85,420	52,753
Goodwill		21,037	6,650
Total assets	[1]	2,623,864	2,461,569
Current liabilities:
Accounts payable and accrued expenses		153,796	91,650
Short term revolving credit lines with banks (full recourse)		51,500
Billings in excess of costs and estimated earnings on uncompleted contracts		20,241	31,630
Current portion of long-term debt:
Senior secured notes		33,226	32,234
Other loans		21,495	21,495
Full recourse		3,087	12,242
Total current liabilities		283,345	189,251
Long-term debt, net of current portion:
Senior secured notes (less deferred financing costs of $8,113 and $9,177, respectively)		311,668	350,388
Other loans (less deferred financing costs of $5,258 and $6,409, respectively)		242,385	261,845
Senior unsecured bonds (less deferred financing costs of $580 and $755, respectively)		203,752	203,577
Other loans (less deferred financing costs of $1,011 and $1,346, respectively)		46,489	57,063
Investment in an unconsolidated company			11,081
Liability associated with sale of tax benefits		44,634	54,662
Deferred lease income		51,520	54,561
Deferred income taxes		61,961	36,411
Liability for unrecognized tax benefits		8,890	6,444
Liabilities for severance pay		21,141	18,600
Asset retirement obligation		27,110	23,348
Other long-term liabilities		18,853	21,294
Total liabilities		1,321,748	1,288,525
Commitments and contingencies (Note 22)
Redeemable noncontrolling interest		6,416	4,772
Equity:
Common stock, par value $0.001 per share; 200,000,000 shares authorized; 50,609,051 and 49,667,340 shares issued and outstanding as of December 31, 2017 and December 31, 2016, respectively		51	50
Additional paid-in capital		888,778	869,463
Retained earnings		327,255	215,352
Accumulated other comprehensive loss		(4,706)	(8,175)
Total equity attributable to Company's stockholders		1,211,378	1,076,690
Noncontrolling interest		84,322	91,582
Total equity		1,295,700	1,168,272
Total liabilities, redeemable noncontrolling interest and equity		$ 2,623,864	$ 2,461,569

[1] Electricity segment assets include goodwill in the amount of $21.0 million and $6.7 million as of December 31, 2017 and 2016, respectively.