Consolidated Balance Sheets - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Current assets:
Cash and cash equivalents (Note 8)	$ 125,689	$ 116,753
Restricted cash (Note 8)	6,324	9,065
Counterparty collateral	5,855	29,780
Trade receivables (Note 8)	50,303	54,900
Derivative assets, current	15,842	19,445
Prepaid expenses (Note 8)	21,080	17,847
Deferred financing costs, current, net of accumulated amortization of $2,670 and $2,580 as of September 30, 2018 and December 31, 2017, respectively	1,482	1,415
Other current assets (Note 8)	13,584	21,105
Total current assets	240,159	270,310
Restricted cash (Note 8)	13,899	12,162
Major construction advances	71,406	0
Construction in progress	221,185	0
Property, plant and equipment, net (Note 8)	4,109,864	3,965,121
Unconsolidated investments	372,380	311,223
Derivative assets	24,757	9,628
Deferred financing costs	8,797	7,784
Net deferred tax assets	1,616	6,349
Finite-lived intangible assets, net (Note 8)	221,183	136,048
Goodwill	56,453	0
Other assets (Note 8)	30,372	22,906
Total assets	5,372,071	4,741,531
Current liabilities:
Accounts payable and other accrued liabilities (Note 8)	57,360	53,615
Accrued construction costs (Note 8)	38,442	1,369
Counterparty collateral liability	5,855	29,780
Accrued interest (Note 8)	7,621	16,460
Dividends payable	42,185	41,387
Derivative liabilities, current	2,190	8,409
Revolving credit facility, current	186,372	0
Current portion of long-term debt, net	63,671	51,996
Contingent liabilities, current	24,771	2,592
Other current liabilities (Note 8)	12,955	11,426
Total current liabilities	441,422	217,034
Revolving credit facility	23,760	0
Long-term debt, net	2,105,834	1,878,735
Derivative liabilities	14,985	20,972
Net deferred tax liabilities	120,104	56,491
Finite-lived intangible liabilities, net (Note 8)	57,039	51,194
Contingent liabilities (Note 8)	140,048	62,398
Asset retirement obligations (Note 8)	192,006	56,619
Other long-term liabilities (Note 8)	64,033	49,946
Advanced lease revenue	28,268	0
Total liabilities	3,187,499	2,393,389
Commitments and contingencies (Note 17)
Equity:
Class A common stock, $0.01 par value per share: 500,000,000 shares authorized; 98,095,886 and 97,860,048 shares outstanding as of September 30, 2018 and December 31, 2017, respectively	983	980
Additional paid-in capital	1,170,450	1,234,846
Accumulated loss	(12,595)	(112,175)
Accumulated other comprehensive loss	(15,716)	(25,691)
Treasury stock, at cost; 178,783 and 157,812 shares of Class A common stock as of September 30, 2018 and December 31, 2017, respectively	(3,901)	(3,511)
Total equity before noncontrolling interest	1,139,221	1,094,449
Noncontrolling interest	1,045,351	1,253,693
Total equity	2,184,572	2,348,142
Total liabilities and equity	$ 5,372,071	$ 4,741,531