Commitments and Contingencies - Additional Information (Details) - USD ($) $ in Millions	1 Months Ended		3 Months Ended		9 Months Ended
	Oct. 31, 2015	Jan. 31, 2015	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015	Dec. 31, 2015
Other Commitments [Line Items]
Letters of credit outstanding, amount			$ 7.7		$ 7.7		$ 3.5
Capital Lease Obligations			26.7		$ 26.7		24.0
Photovoltaic Modules
Other Commitments [Line Items]
Purchase commitment with suppliers	$ 146.0	$ 70.0
Long-term purchase commitment, period					12 months
Long term purchase commitment ending period	2016-12
Long term purchase commitment period option to extend	Mar. 31, 2017
Commitment of $146.0 million | Photovoltaic Modules
Other Commitments [Line Items]
Delivered purchase commitments			$ 21.8		$ 21.8
Maximum | Capital Lease Obligations
Other Commitments [Line Items]
Lease obligation interest rates			10.00%		10.00%
Non Cancellable Operating Leases Arrangements
Other Commitments [Line Items]
Operating lease expenses			$ 2.9	$ 1.9	$ 8.5	$ 4.9
Deferred rent liabilities			$ 2.7		$ 2.7		$ 1.9
Letter of Credit
Other Commitments [Line Items]
Letter of credit, fee percentage					2.75%