CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014
Operating activities:
Net loss	$ (174,600)	$ (102,458)
Adjustments to reconcile net loss to net cash provided by (used in) operating activities:
Noncash losses and impairments	(2,545)
Depreciation and amortization, net of amortization of deferred grants	51,059	35,443
Bad debt expense	1,158	356
Interest on lease pass-through financing	9,425	7,042
Noncash tax benefit	(5,312)	(10,043)
Noncash interest expense	5,349	1,784
Stock—based compensation expense	10,427	6,037
Reduction in lease pass—through financing obligations	(16,059)	(8,337)
Changes in operating assets and liabilities:
Accounts receivable	(5,999)	(6,008)
Inventories	(27,993)	(4,928)
Prepaid and other assets	3,039	4,317
Accounts payable	37,605	10,173
Accrued expenses and other liabilities	5,568	7,545
Deferred revenue	31,856	63,040
Net cash provided by (used in) operating activities	(71,932)	3,963
Investing activities:
Payments for the costs of solar energy systems, leased and to be leased	(408,861)	(296,810)
Purchases of property and equipment	(8,416)	(6,185)
Acquisitions of businesses, net of cash acquired	(14,575)	(36,384)
Net cash used in investing activities	(431,852)	(339,379)
Financing activities:
Proceeds from grants and state tax credits	4,975	72
Proceeds from issuance of debt	318,000	13,546
Repayment of debt	(199,860)	(3,683)
Payment of debt fees	(14,751)	(285)
Proceeds from solar asset-backed notes	111,000
Repayment of solar asset-backed notes	(1,302)
Proceeds from issuance of convertible preferred stock, net of issuance costs		143,393
Proceeds from lease pass-through financing obligations	73,300	119,596
Repayment of lease pass-through financing obligations	(88,918)
Contributions received from noncontrolling interests and redeemable noncontrolling interests	215,724	144,480
Distributions paid to noncontrolling interests and redeemable noncontrolling interests	(20,248)	(26,294)
Proceeds from exercises of stock options	3,188	2,404
Proceeds from initial public offering, net of offering costs	223,541
Payment of capital lease obligation	(2,670)	(843)
Change in restricted cash	(7,343)	(1,016)
Net cash provided by financing activities	614,636	391,370
Net increase in cash and cash equivalents	110,852	55,954
Cash and cash equivalents, beginning of period	152,154	99,699
Cash and cash equivalents, end of period	263,006	155,653
Supplemental disclosures of cash flow information
Cash paid for interest	7,740	9,926
Supplemental disclosures of noncash investing and financing activities
Costs of solar energy systems included in accounts payable	8,447	1,068
Distributions payable to noncontrolling interests and redeemable noncontrolling interests	7,224	5,803
Vehicles acquired under capital leases	13,160	2,195
Noncash purchase consideration on acquisition of business	18,718	$ 76,964
Deferred offering costs not yet paid	1,463
Deferred offering costs prepaid in prior year	760
Series D and E Preferred Shares
Supplemental disclosures of noncash investing and financing activities
Deemed dividend on Series D and E preferred shares	$ 24,890