Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016
Operating activities
Net loss	$ (12,145)	$ (44,694)
Adjustments to reconcile net loss to net cash provided by operating activities:
Depreciation and accretion	92,258	87,089
Amortization of financing costs	3,852	3,498
Amortization of debt discount/premium, net	2,227	2,074
Amortization of power purchase agreements, net	1,489	1,507
Loss on derivatives, net	10,331	32,209
Stock-based compensation	2,768	2,777
Deferred taxes	9,149	2,487
Earnings in unconsolidated investments, net	(31,395)	(11,070)
Distributions from unconsolidated investments	31,710	377
Other reconciling items	(1,017)	(965)
Changes in operating assets and liabilities:
Funds deposited by counterparty	9,199	(49,480)
Trade receivables	(7,995)	(3,753)
Prepaid expenses	2,202	3,400
Other current assets	(3,638)	(2,920)
Other assets (non-current)	2,561	1,839
Accounts payable and other accrued liabilities	31,001	(9,631)
Counterparty deposit liability	(9,199)	49,480
Accrued interest	8,569	(178)
Other current liabilities	4,333	(433)
Long-term liabilities	10,648	6,353
Contingent liabilities	275	10
Net cash provided by operating activities	157,183	69,976
Investing activities
Cash paid for acquisitions, net of cash and restricted cash acquired	(170,028)	0
Capital expenditures	(39,087)	(25,953)
Distributions from unconsolidated investments	8,390	31,774
Other assets	(7,552)	(38)
Other investing activities	12	(163)
Net cash provided by (used in) investing activities	(193,161)	5,696
Financing activities
Dividends paid	(71,544)	(56,097)
Capital distributions - noncontrolling interest	(9,163)	(8,187)
Payment for deferred financing costs	(7,740)	(134)
Proceeds from revolving credit facility	85,000	20,000
Repayment of revolving credit facility	(205,000)	(40,000)
Proceeds from debt	404,395	0
Repayment of debt	(74,824)	(22,262)
Other financing activities	(3,618)	(1,060)
Net cash provided by (used in) financing activities	117,506	(107,740)
Effect of exchange rate changes on cash, cash equivalents and restricted cash	2,248	2,017
Net change in cash, cash equivalents and restricted cash	83,776	(30,051)
Cash, cash equivalents and restricted cash at beginning of period	109,371	146,292
Cash, cash equivalents and restricted cash at end of period	193,147	116,241
Supplemental disclosures
Cash payments for income taxes	288	155
Cash payments for interest expense	33,666	36,535
Schedule of non-cash activities
Change in property, plant and equipment	1,110	1,302
Change in other assets	$ 2,492	$ 0