Consolidated Balance Sheets - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 31, 2017
Current assets:
Cash and cash equivalents (Note 8)	$ 116,538	$ 116,753
Restricted cash (Note 8)	4,336	9,065
Counterparty collateral	5,824	29,780
Trade receivables (Note 8)	59,371	54,900
Derivative assets, current	16,148	19,445
Prepaid expenses (Note 8)	18,660	17,847
Deferred financing costs, current, net of accumulated amortization of $2,409 and $2,580 as of June 30, 2018 and December 31, 2017, respectively	1,422	1,415
Assets held for sale	307,231	0
Other current assets (Note 8)	21,726	21,105
Total current assets	551,256	270,310
Restricted cash (Note 8)	10,004	12,162
Major construction advances	48,898	0
Construction in progress	192,317	0
Property, plant and equipment, net (Note 8)	3,797,098	3,965,121
Unconsolidated investments	343,512	311,223
Derivative assets	17,341	9,628
Deferred financing costs	8,744	7,784
Net deferred tax assets	3,353	6,349
Finite-lived intangible assets, net (Note 8)	226,422	136,048
Goodwill	57,736	0
Other assets (Note 8)	27,421	22,906
Total assets	5,284,102	4,741,531
Current liabilities:
Accounts payable and other accrued liabilities (Note 8)	38,799	53,615
Accrued construction costs (Note 8)	9,383	1,369
Counterparty collateral liability	5,824	29,780
Accrued interest (Note 8)	14,383	16,460
Dividends payable	42,072	41,387
Derivative liabilities, current	3,188	8,409
Revolving credit facility	201,000	0
Current portion of long-term debt, net	61,583	51,996
Liabilities related to assets held for sale	207,073	0
Other current liabilities (Note 8)	25,643	14,018
Total current liabilities	608,948	217,034
Long-term debt, net	1,923,743	1,878,735
Derivative liabilities	24,464	20,972
Net deferred tax liabilities	116,849	56,491
Finite-lived intangible liabilities, net (Note 8)	58,195	51,194
Contingent liabilities (Note 8)	165,214	62,398
Other long-term liabilities (Note 8)	152,998	106,565
Total liabilities	3,050,411	2,393,389
Commitments and contingencies (Note 17)
Equity:
Class A common stock, $0.01 par value per share: 500,000,000 shares authorized; 98,096,323 and 97,860,048 shares outstanding as of June 30, 2018 and December 31, 2017, respectively	983	980
Additional paid-in capital	1,210,610	1,234,846
Accumulated income (loss)	0	(112,175)
Accumulated other comprehensive loss	(32,756)	(25,691)
Treasury stock, at cost; 178,346 and 157,812 shares of Class A common stock as of June 30, 2018 and December 31, 2017, respectively	(3,892)	(3,511)
Total equity before noncontrolling interest	1,174,945	1,094,449
Noncontrolling interest	1,058,746	1,253,693
Total equity	2,233,691	2,348,142
Total liabilities and equity	$ 5,284,102	$ 4,741,531