Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017
Operating activities
Net loss	$ (14,394)	$ (12,145)
Adjustments to reconcile net loss to net cash provided by operating activities:
Depreciation, amortization and accretion	110,431	92,258
Contingent liability accretion	5,716	0
Impairment loss	4,238	0
Amortization of financing costs	2,526	3,852
Amortization of debt discount/premium, net	2,477	2,227
Amortization of power purchase agreements, net	3,894	1,489
Loss (gain) on derivatives	(1,542)	10,331
Stock-based compensation	2,277	2,768
Deferred taxes	10,914	9,149
Earnings in unconsolidated investments, net	(17,470)	(31,395)
Distributions from unconsolidated investments	33,041	31,710
Other reconciling items	(67)	(1,017)
Changes in operating assets and liabilities:
Counterparty collateral asset	23,956	9,199
Trade receivables	(9,689)	(7,995)
Prepaid expenses	899	2,202
Other current assets	6,316	(3,638)
Other assets (non-current)	(1,737)	2,561
Accounts payable and other accrued liabilities	(13,889)	31,001
Counterparty collateral liability	(23,956)	(9,199)
Accrued interest	166	8,569
Other current liabilities	(7,141)	4,333
Long-term liabilities	7,858	10,648
Contingent liabilities	(1,508)	275
Derivatives	228	0
Net cash provided by operating activities	123,544	157,183
Investing activities
Cash paid for acquisitions, net of cash and restricted cash acquired	(157,543)	(170,028)
Payment for construction advances/deposits	(53,727)	0
Payment for construction in progress	(24,644)	0
Capital expenditures	(7,441)	(39,087)
Distributions from unconsolidated investments	4,333	8,390
Other assets	(319)
Other assets		7,552
Investment in Pattern Development 2.0	(57,055)	0
Other investing activities	0	12
Net cash used in investing activities	(296,396)	(193,161)
Financing activities
Dividends paid	(82,487)	(71,544)
Capital distributions - noncontrolling interest	(21,274)	(9,163)
Payment for financing fees	(6,954)	(7,740)
Proceeds from revolving credit facility	333,000	85,000
Repayment of revolving credit facility	(132,000)	(205,000)
Proceeds from long-term debt	126,775	404,395
Repayment of long-term debt	(34,541)	(74,824)
Repayment of note payable - related party	(909)	0
Repayment of short-term debt	154	(3,618)
Net cash provided by financing activities	181,764	117,506
Effect of exchange rate changes on cash, cash equivalents and restricted cash	(2,388)	2,248
Net increase in cash, cash equivalents and restricted cash including cash classified within current assets and liabilities held for sale	6,524	83,776
Add: Net (decrease) in cash classified within current assets and liabilities held for sale	(13,626)	0
Net change in cash, cash equivalents and restricted cash	(7,102)	83,776
Cash, cash equivalents and restricted cash at beginning of period	137,980	109,371
Cash, cash equivalents and restricted cash at end of period	130,878	193,147
Supplemental disclosures
Cash payments for income taxes	443	288
Cash payments for interest expense	48,721	33,666
Business combination:
Assets acquired, net of cash and restricted cash acquired	627,241	665,014
Liabilities assumed	352,570	148,456
Less: Noncontrolling interests	11,113	325,600
Net assets acquired, net of cash and restricted cash acquired	263,558	190,958
Schedule of non-cash activities
Change in property, plant and equipment	117,103	1,110
Change in other assets	202	2,492
Accrual of dividends	$ 87	$ 0