Condensed Consolidated Balance Sheets (Unaudited) (Parentheticals) - USD ($)	Sep. 30, 2016	Dec. 31, 2015
Variable Interest Entity, Primary Beneficiary [Member]
Property, plant and equipment, net	$ 1,499,112,000	$ 1,481,258,000
Construction-in-process	82,476,000	129,165,000
Senior Secured Notes [Member]
Deferred financing costs	9,957,000	10,852,000
Other Loans, Limited and Non-recourse [Member]
Deferred financing costs	6,821,000	7,492,000
Senior Unsecured Bonds [Member]
Deferred financing costs	849,000	283,000
Other Loans, Full Recourse [Member]
Deferred financing costs	290,000	435,000
Property, plant and equipment, net	1,570,307,000	1,559,335,000
Construction-in-process	$ 271,853,000	$ 248,835,000
Senior unsecured bonds %	7.00%	7.00%
Senior unsecured bonds unamortized premium	$ 0	$ 513,000
Common stock, par value (in dollars per share)	$ 0.001	$ 0.001
Common stock, shares authorized (in shares)	200,000,000	200,000,000
Common stock, shares issued (in shares)	49,634,659	49,107,901
Common stock, shares outstanding (in shares)	49,634,659	49,107,901