Condensed Consolidated Balance Sheets (Current Period Unaudited) - USD ($) $ in Thousands	Sep. 30, 2018		Dec. 31, 2017
Current assets:
Cash and cash equivalents	$ 71,965		$ 47,818
Restricted cash and cash equivalents (primarily related to VIEs)	83,101		48,825
Receivables:
Trade	118,675		110,410
Other	18,328		13,828
Inventories	37,442		19,551
Costs and estimated earnings in excess of billings on uncompleted contracts	47,811		40,945
Prepaid expenses and other	44,452		40,269
Total current assets	421,774		321,646
Investment in an unconsolidated company	67,739		34,084
Deposits and other	20,109		21,599
Deferred income taxes	113,363		57,337
Deferred charges			49,834
Property, plant and equipment, net	1,835,939		1,734,691
Construction-in-process	351,288		293,542
Deferred financing and lease costs, net	5,878		4,674
Intangible assets, net	203,382		85,420
Goodwill	40,111		21,037
Total assets	3,059,583	[1]	2,623,864
Current liabilities:
Accounts payable and accrued expenses	105,351		153,796
Short term revolving credit lines with banks (full recourse)	209,500		51,500
Billings in excess of costs and estimated earnings on uncompleted contracts	21,760		20,241
Current portion of long-term debt:
Senior secured notes	33,259		33,226
Other loans	21,495		21,495
Full recourse	5,000		3,087
Total current liabilities	396,365		283,345
Long-term debt, net of current portion:
Senior secured notes (less deferred financing costs of $7,758 and $8,113, respectively)	386,379		311,668
Other loans (less deferred financing costs of $4,823 and $5,258, respectively)	225,782		242,385
Senior unsecured bonds (less deferred financing costs of $804 and $580, respectively)	303,528		203,752
Other loans (less deferred financing costs of $1,058 and $1,011, respectively)	43,942		46,489
Liability associated with sale of tax benefits	69,071		44,634
Deferred lease income	49,203		51,520
Deferred income taxes	56,753		61,961
Liability for unrecognized tax benefits	10,139		8,890
Liabilities for severance pay	19,903		21,141
Asset retirement obligation	37,946		27,110
Other long-term liabilities	22,354		18,853
Total liabilities	1,621,365		1,321,748
Commitments and contingencies (Note 10)
Redeemable noncontrolling interest	8,522		6,416
Equity:
Common stock, par value $0.001 per share; 200,000,000 shares authorized; 50,672,520 and 50,609,051 shares issued and outstanding as of September 30, 2018 and December 31, 2017, respectively	51		51
Additional paid-in capital	896,160		888,778
Retained earnings	410,870		327,255
Accumulated other comprehensive income (loss)	(1,386)		(4,706)
Total stockholders' equity attributable to Company's stockholders	1,305,695		1,211,378
Noncontrolling interest	124,001		84,322
Total equity	1,429,696		1,295,700
Total liabilities, redeemable noncontrolling interest and equity	$ 3,059,583		$ 2,623,864

[1] Electricity segment assets include goodwill in the amount of $26.7 million and $6.8 million as of September 30, 2018 and 2017, respectively. Other segment assets include goodwill in the amount of $13.5 million as of September 30, 2018 and 2017.