Condensed Consolidated Balance Sheets (Current Period Unaudited) - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016
Current assets:
Cash and cash equivalents	$ 174,138	$ 230,214
Restricted cash and cash equivalents (primarily related to VIEs)	59,879	34,262
Receivables:
Trade	68,920	80,807
Other	10,976	17,482
Inventories	17,804	12,000
Costs and estimated earnings in excess of billings on uncompleted contracts	56,550	52,198
Prepaid expenses and other	40,482	45,867
Total current assets	428,749	472,830
Investment in an unconsolidated company	2,806
Deposits and other	20,075	18,553
Deferred charges	43,960	43,773
Property, plant and equipment, net ($1,468,459 and $1,483,224 related to VIEs, respectively)	1,542,687	1,556,378
Construction-in-process ($129,965 and $120,853 related to VIEs, respectively)	351,636	306,709
Deferred financing and lease costs, net	3,465	3,923
Intangible assets, net	86,800	52,753
Goodwill	19,710	6,650
Total assets	2,499,888	2,461,569
Current liabilities:
Accounts payable and accrued expenses	95,518	91,650
Short term revolving credit lines with banks (full recourse)	30,000
Billings in excess of costs and estimated earnings on uncompleted contracts	17,595	31,630
Current portion of long-term debt:
Senior secured notes	32,285	32,234
Other loans	21,495	21,495
Full recourse	10,598	12,242
Total current liabilities	207,491	189,251
Long-term debt, net of current portion:
Senior secured notes (less deferred financing costs of $8,997 and $9,177, respectively)	344,397	350,388
Other loans (less deferred financing costs of $6,197 and $6,409, respectively)	256,787	261,845
Senior unsecured bonds (less deferred financing costs of $683 and $755, respectively)	203,649	203,577
Other loans (less deferred financing costs of $1,276 and $1,346, respectively)	56,890	57,063
Investment in an unconsolidated company in excess of accumulated losses		11,081
Liability associated with sale of tax benefits	51,122	54,662
Deferred lease income	53,798	54,561
Deferred income taxes	42,283	35,382
Liability for unrecognized tax benefits	6,312	5,738
Liabilities for severance pay	19,530	18,600
Asset retirement obligation	23,803	23,348
Other long-term liabilities	32,130	21,294
Total liabilities	1,298,192	1,286,790
Commitments and contingencies (Note 10)
Reedemable noncontrolling interest	5,195	4,772
Equity:
Common stock, par value $0.001 per share; 200,000,000 shares authorized; 49,706,450 and 49,667,340 shares issued and outstanding as of March 31, 2017 and December 31, 2016, respectively	50	50
Additional paid-in capital	871,176	869,463
Retained earnings	243,508	216,644
Accumulated other comprehensive income (loss)	(7,076)	(7,732)
	1,107,658	1,078,425
Noncontrolling interest	88,843	91,582
Total equity	1,196,501	1,170,007
Total liabilities and equity	$ 2,499,888	$ 2,461,569