Condensed Consolidated Balance Sheets (Current Period Unaudited) - USD ($) $ in Thousands	Mar. 31, 2018		Dec. 31, 2017
Current assets:
Cash and cash equivalents	$ 54,723		$ 47,818
Restricted cash and cash equivalents (primarily related to VIEs)	50,332		48,825
Receivables:
Trade	103,580		110,410
Other	10,018		13,828
Inventories	20,069		19,551
Costs and estimated earnings in excess of billings on uncompleted contracts	41,134		40,945
Prepaid expenses and other	42,274		40,269
Total current assets	322,130		321,646
Investment in an unconsolidated company	63,109		34,084
Deposits and other	21,205		21,599
Deferred income taxes	124,304		57,337
Deferred charges			49,834
Property, plant and equipment, net	1,723,560		1,734,691
Construction-in-process	345,563		293,542
Deferred financing and lease costs, net	4,922		4,674
Intangible assets, net	84,771		85,420
Goodwill	21,253		21,037
Total assets	2,710,817	[1]	2,623,864
Current liabilities:
Accounts payable and accrued expenses	103,551		153,796
Short term revolving credit lines with banks (full recourse)	38,500		51,500
Billings in excess of costs and estimated earnings on uncompleted contracts	10,458		20,241
Current portion of long-term debt:
Senior secured notes	28,398		33,226
Other loans	21,495		21,495
Full recourse	2,809		3,087
Total current liabilities	205,211		283,345
Long-term debt, net of current portion:
Senior secured notes (less deferred financing costs of $7,693 and $8,113, respectively)	305,905		311,668
Other loans (less deferred financing costs of $5,231 and $5,258, respectively)	237,245		242,385
Senior unsecured bonds (less deferred financing costs of $863 and $580, respectively)	303,469		203,752
Other loans (less deferred financing costs of $994 and $1,011, respectively)	46,506		46,489
Liability associated with sale of tax benefits	42,622		44,634
Deferred lease income	50,745		51,520
Deferred income taxes	48,074		61,961
Liability for unrecognized tax benefits	9,074		8,890
Liabilities for severance pay	20,874		21,141
Asset retirement obligation	27,639		27,110
Other long-term liabilities	21,625		18,853
Total liabilities	1,318,989		1,321,748
Commitments and contingencies (Note 10)
Redeemable noncontrolling interest	6,943		6,416
Equity:
Common stock, par value $0.001 per share; 200,000,000 shares authorized; 50,617,209 and 50,609,051 shares issued and outstanding as of March 31, 2018 and December 31, 2017, respectively	51		51
Additional paid-in capital	890,485		888,778
Retained earnings	410,758		327,255
Accumulated other comprehensive loss	(909)		(4,706)
Total equity attributable to the Company's stockholders	1,300,385		1,211,378
Noncontrolling interest	84,500		84,322
Total equity	1,384,885		1,295,700
Total liabilities, redeemable noncontrolling interest and equity	$ 2,710,817		$ 2,623,864

[1] Electricity segment assets include goodwill in the amount of $7.8 million and $6.2 million as of March, 31, 2018 and 2017, respectively. Other segment assets include goodwill in the amount of $13.5 million as of March 31, 2018 and 2017.