Subsequent Events	12 Months Ended
Dec. 31, 2016
Subsequent Events [Abstract]
Subsequent Events	20.Subsequent Events 2017 Term Loan On January 5, 2017, the Company entered into a long-term fixed rate credit agreement (the “2017 Term Loan”) pursuant to which the Company borrowed $203.8 million with certain financial institutions for which Wells Fargo Bank, National Association is acting as administrative agent. The borrower under the 2017 Term Loan is Vivint Solar Financing III, LLC, a wholly owned indirect subsidiary of the Company. Proceeds of the 2017 Term Loan were used to (1) repay existing indebtedness of $140.3 million under the Aggregation Facility with respect to the portfolio of projects being used as collateral for the 2017 Term Loan (the “2017 Term Loan Portfolio”), (2) fund a debt service reserve account and other agreed reserves of $20.1 million, (3) pay transaction costs and fees in connection with the 2017 Term Loan of $5.5 million, (4) pay the ITC insurance premium of $2.0 million on behalf of one of the Company’s investment funds, and (5) distribute $35.9 million to the Company as reimbursement for capital costs associated with deployment of the 2017 Term Loan Portfolio. Interest on borrowings accrue at an annual fixed rate equal to 6.0% and is payable in arrears. Certain principal payments are due on a quarterly basis, subject to the occurrence of certain events. The Company’s first principal and interest payment is due on April 30, 2017. Principal and interest payable under the 2017 Term Loan will be paid over the term of the loan until the final maturity date of January 5, 2035. Optional prepayments are permitted under the 2017 Term Loan without premium or penalty. The 2017 Term Loan includes customary events of default, conditions to borrowing and covenants, including negative covenants that restrict, subject to certain exceptions, the borrower’s and guarantors’ ability to incur indebtedness, incur liens, make fundamental changes to their respective businesses, make certain types of restricted payments and investments or enter into certain transactions with affiliates. The borrower is required to maintain an average debt service coverage ratio of 1.20 to 1. The obligations of the borrower are secured by a pledge of the membership interests in the borrower, all of the borrower’s assets, and the assets of the borrower’s directly owned subsidiaries acting as managing members of the 2017 Term Loan Portfolio. In addition, the Company shall guarantee certain obligations of the borrower under the 2017 Term Loan. Aggregation Facility Amendment On March 9, 2017, the Company amended and restated the Aggregation Facility. Pursuant to the Aggregation Facility, as amended, the parties agreed to (1) extend the date through which the Company may incur borrowings under the Aggregation Facility to March 31, 2020 (“Availability Period”), with an option to extend such period by an additional 12 months to the extent the lenders agree to such extension; (2) extend the maturity date for the initial loans under the Aggregation Facility from March 12, 2018 to September 30, 2020; and (3) increase the “Applicable Margin” used to determine the applicable interest rate on outstanding borrowings after the Availability Period from 3.50% to 3.75%. The “Applicable Margin” used to determine the applicable interest rate on outstanding borrowings during the Availability Period remains unchanged at 3.25%. In addition, the amendments to the Aggregation Facility, (1) allow the Company to satisfy concentration covenants by maintaining insurance policies with respect to certain tax equity funds for the benefit of the lenders to cover any indemnification payments the Company may be required to make to certain of its tax equity investors in connection with the loss of ITCs and (2) modify the customer FICO score requirement thresholds to enable the Company to borrow more against certain solar energy systems. The amendments to the Aggregation Facility also provide the ability for the Company to enter into forward-starting interest rate hedges and require no less than 75% of outstanding loan balances to be hedged at all times.

20.Subsequent Events

2017 Term Loan

On January 5, 2017, the Company entered into a long-term fixed rate credit agreement (the “2017 Term Loan”) pursuant to which the Company borrowed $203.8 million with certain financial institutions for which Wells Fargo Bank, National Association is acting as administrative agent. The borrower under the 2017 Term Loan is Vivint Solar Financing III, LLC, a wholly owned indirect subsidiary of the Company. Proceeds of the 2017 Term Loan were used to (1) repay existing indebtedness of $140.3 million under the Aggregation Facility with respect to the portfolio of projects being used as collateral for the 2017 Term Loan (the “2017 Term Loan Portfolio”), (2) fund a debt service reserve account and other agreed reserves of $20.1 million, (3) pay transaction costs and fees in connection with the 2017 Term Loan of $5.5 million, (4) pay the ITC insurance premium of $2.0 million on behalf of one of the Company’s investment funds, and (5) distribute $35.9 million to the Company as reimbursement for capital costs associated with deployment of the 2017 Term Loan Portfolio.

Interest on borrowings accrue at an annual fixed rate equal to 6.0% and is payable in arrears. Certain principal payments are due on a quarterly basis, subject to the occurrence of certain events. The Company’s first principal and interest payment is due on April 30, 2017. Principal and interest payable under the 2017 Term Loan will be paid over the term of the loan until the final maturity date of January 5, 2035. Optional prepayments are permitted under the 2017 Term Loan without premium or penalty.

The 2017 Term Loan includes customary events of default, conditions to borrowing and covenants, including negative covenants that restrict, subject to certain exceptions, the borrower’s and guarantors’ ability to incur indebtedness, incur liens, make fundamental changes to their respective businesses, make certain types of restricted payments and investments or enter into certain transactions with affiliates. The borrower is required to maintain an average debt service coverage ratio of 1.20 to 1.

The obligations of the borrower are secured by a pledge of the membership interests in the borrower, all of the borrower’s assets, and the assets of the borrower’s directly owned subsidiaries acting as managing members of the 2017 Term Loan Portfolio. In addition, the Company shall guarantee certain obligations of the borrower under the 2017 Term Loan.

Aggregation Facility Amendment

On March 9, 2017, the Company amended and restated the Aggregation Facility. Pursuant to the Aggregation Facility, as amended, the parties agreed to (1) extend the date through which the Company may incur borrowings under the Aggregation Facility to March 31, 2020 (“Availability Period”), with an option to extend such period by an additional 12 months to the extent the lenders agree to such extension; (2) extend the maturity date for the initial loans under the Aggregation Facility from March 12, 2018 to September 30, 2020; and (3) increase the “Applicable Margin” used to determine the applicable interest rate on outstanding borrowings after the Availability Period from 3.50% to 3.75%. The “Applicable Margin” used to determine the applicable interest rate on outstanding borrowings during the Availability Period remains unchanged at 3.25%.

In addition, the amendments to the Aggregation Facility, (1) allow the Company to satisfy concentration covenants by maintaining insurance policies with respect to certain tax equity funds for the benefit of the lenders to cover any indemnification payments the Company may be required to make to certain of its tax equity investors in connection with the loss of ITCs and (2) modify the customer FICO score requirement thresholds to enable the Company to borrow more against certain solar energy systems. The amendments to the Aggregation Facility also provide the ability for the Company to enter into forward-starting interest rate hedges and require no less than 75% of outstanding loan balances to be hedged at all times.