Acquisition Schedule of Assets Acquired and Liabilties Assumed (Details) - Broadview Project [Member] $ in Thousands	Apr. 21, 2017 USD ($)
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Cash and Equivalents	$ 3,022
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets, Receivables	3,259
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets, Prepaid Expense and Other Assets	187
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets, Other	9,830
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Restricted Cash	44,383
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Deferred Financing Costs, Net	1,890
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Property, Plant, and Equipment	628,500
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles	22,346
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities, Accounts Payable	(2,956)
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Accrued Interest	(108)
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities, Long-term Debt	(51,053)
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Accrued Construction Cost	(40,114)
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Related Party Payable	(674)
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Contingent Liability	(36,205)
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Asset Retirement Obligation	(5,994)
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Noncurrent Liabilities, Other	(12,350)
Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net	563,963
Business Combination, Acquisition of Less than 100 Percent, Noncontrolling Interest, Fair Value	(325,600)
Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Less Noncontrolling Interest	$ 238,363