Quarterly report pursuant to Section 13 or 15(d)

Business Acquisitions and Related Transactions - Consideration Paid and the Allocation of the Purchase Price (Details)

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Business Acquisitions and Related Transactions - Consideration Paid and the Allocation of the Purchase Price (Details) - USD ($)
$ in Thousands
9 Months Ended 12 Months Ended
Sep. 30, 2018
Sep. 30, 2017
Dec. 31, 2017
Business Acquisition [Line Items]      
Goodwill $ 58,853   $ 56,135
Total, net of cash received 62,687 $ 2,409  
Solar Photovoltaic Projects And EEX      
Business Acquisition [Line Items]      
Accounts receivable 793   0
Prepaid expenses and other current assets 11   256
Property and equipment and energy assets 63,119   7,788
Intangibles 680   0
Goodwill 3,042   0
Accounts payable (42)   0
Purchase price 67,687   8,044
Total, net of cash received 67,687   8,044
Debt assumed 0   5,635
Total fair value of consideration $ 67,687   $ 2,409