Condensed Consolidated Balance Sheets (Current Period Unaudited) - USD ($) $ in Thousands	Jun. 30, 2018		Dec. 31, 2017
Current assets:
Cash and cash equivalents	$ 66,696		$ 47,818
Restricted cash and cash equivalents (primarily related to VIEs)	76,041		48,825
Receivables:
Trade	109,061		110,410
Other	20,731		13,828
Inventories	36,696		19,551
Costs and estimated earnings in excess of billings on uncompleted contracts	46,573		40,945
Prepaid expenses and other	39,836		40,269
Total current assets	395,634		321,646
Investment in an unconsolidated company	66,551		34,084
Deposits and other	20,532		21,599
Deferred income taxes	102,162		57,337
Deferred charges			49,834
Property, plant and equipment, net	1,840,558		1,734,691
Construction-in-process	316,447		293,542
Deferred financing and lease costs, net	4,926		4,674
Intangible assets, net	207,206		85,420
Goodwill	40,133		21,037
Total assets	2,994,149	[1]	2,623,864
Current liabilities:
Accounts payable and accrued expenses	103,342		153,796
Short term revolving credit lines with banks (full recourse)	158,600		51,500
Billings in excess of costs and estimated earnings on uncompleted contracts	16,136		20,241
Current portion of long-term debt:
Senior secured notes	36,458		33,226
Other loans	21,495		21,495
Full recourse	5,000		3,087
Total current liabilities	341,031		283,345
Senior secured notes (less deferred financing costs of $7,987 and $8,113, respectively)	391,047		311,668
Other loans (less deferred financing costs of $5,025 and $5,258, respectively)	230,973		242,385
Senior unsecured bonds (less deferred financing costs of $813 and $580, respectively)	303,527		203,752
Other loans (less deferred financing costs of $970 and $1,011, respectively)	44,030		46,489
Liability associated with sale of tax benefits	70,574		44,634
Deferred lease income	49,973		51,520
Deferred income taxes	47,128		61,961
Liability for unrecognized tax benefits	9,637		8,890
Liabilities for severance pay	20,159		21,141
Asset retirement obligation	37,188		27,110
Other long-term liabilities	21,817		18,853
Total liabilities	1,567,084		1,321,748
Commitments and contingencies (Note 10)
Redeemable noncontrolling interest	8,268		6,416
Equity:
Common stock, par value $0.001 per share; 200,000,000 shares authorized; 50,630,138 and 50,609,051 shares issued and outstanding as of June 30, 2018 and December 31, 2017, respectively	51		51
Additional paid-in capital	892,601		888,778
Retained earnings	405,353		327,255
Accumulated other comprehensive income (loss)	(2,297)		(4,706)
Total stockholders' equity attributable to Company's stockholders	1,295,708		1,211,378
Noncontrolling interest	123,089		84,322
Total equity	1,418,797		1,295,700
Total liabilities, redeemable nonconrolling interest and equity	$ 2,994,149		$ 2,623,864

[1] Electricity segment assets include goodwill in the amount of $26.7 million and $6.6 million as of June 30, 2018 and 2017, respectively. Other segment assets include goodwill in the amount of $13.5 million as of June 30, 2018 and 2017.