Indebtedness - Schedule of Debt (Parenthetical) (Details)	3 Months Ended	12 Months Ended
	Mar. 31, 2017	Dec. 31, 2016
Recourse Debt | Lines of Credit | Basis point
Debt Instrument [Line Items]
Annual Contractual Interest Rate	3.25%	3.25%
Recourse Debt | Lines of Credit | Base Rate
Debt Instrument [Line Items]
Annual Contractual Interest Rate	2.25%	2.25%
Recourse Debt | Lines of Credit | Federal Funds Rate
Debt Instrument [Line Items]
Annual Contractual Interest Rate	0.50%	0.50%
Recourse Debt | Lines of Credit | Prime Rate
Debt Instrument [Line Items]
Annual Contractual Interest Rate	1.00%	1.00%
Non Recourse Debt | Basis point
Debt Instrument [Line Items]
Annual Contractual Interest Rate	3.00%
Non Recourse Debt | Basis point | Line of Credit
Debt Instrument [Line Items]
Annual Contractual Interest Rate	2.50%	2.50%
Debt instrument, variable rate periodic increase	2.75%	2.75%
Revolving line of credit facility available period	3 years	3 years
Revolving line of credit facility available period increase	2 years	2 years
Secured Debt | Contracted SRECs | Basis point
Debt Instrument [Line Items]
Annual Contractual Interest Rate	5.50%	5.50%
Secured Debt | Uncontracted SRECs | Basis point
Debt Instrument [Line Items]
Annual Contractual Interest Rate	9.00%	9.00%