Summary of Significant Accounting Policies - Narrative (Details)
₨ in Millions |
12 Months Ended |
|
|
Dec. 19, 2016
USD ($)
|
Dec. 31, 2015
INR (₨)
solar_project
tariff
¥ / kWh
|
Dec. 31, 2015
USD ($)
solar_project
tariff
¥ / kWh
|
Dec. 31, 2014
USD ($)
|
Dec. 31, 2013
USD ($)
|
Dec. 31, 2012
USD ($)
|
| Accounting Policies [Line Items] |
|
|
|
|
|
|
| Restricted cash |
|
|
$ 22,582,000
|
$ 21,312,000
|
|
|
| Cash and cash equivalents |
|
|
921,946,000
|
150,146,000
|
$ 3,148,000
|
$ 4,010,000
|
| Allowance for doubtful accounts receivable |
|
|
0
|
0
|
|
|
| Write-offs of accounts receivable |
|
|
0
|
0
|
0
|
|
| Impairment of long-lived assets held-for-use |
|
|
0
|
0
|
0
|
|
| Impairment of intangible assets |
|
|
0
|
0
|
0
|
|
| Deferred financing costs |
|
|
42,700,000
|
0
|
0
|
|
| Amortization of deferred financing costs |
|
|
21,159,000
|
1,140,000
|
772,000
|
|
| Foreign currency transaction gains/losses included in other income |
|
|
35,363,000
|
(4,038,000)
|
2,247,000
|
|
| Debt issuance costs |
|
|
5,600,000
|
|
|
|
| Deferred tax assets, net, current |
|
|
|
200,000
|
|
|
| Deferred tax liabilities, net, current |
|
|
0
|
1,384,000
|
|
|
| Restatement adjustment |
|
|
|
|
|
|
| Accounting Policies [Line Items] |
|
|
|
|
|
|
| Restricted cash |
|
|
(16,600,000)
|
|
|
|
| Cash and cash equivalents |
|
|
$ 16,600,000
|
|
|
|
| Minimum |
|
|
|
|
|
|
| Accounting Policies [Line Items] |
|
|
|
|
|
|
| Weighted average remaining life of intangibles |
|
10 years
|
10 years
|
|
|
|
| Maximum |
|
|
|
|
|
|
| Accounting Policies [Line Items] |
|
|
|
|
|
|
| Weighted average remaining life of intangibles |
|
25 years
|
25 years
|
|
|
|
| Revenue contracts |
|
|
|
|
|
|
| Accounting Policies [Line Items] |
|
|
|
|
|
|
| Weighted average remaining life of intangibles |
|
17 years
|
17 years
|
|
|
|
| Revenue contracts | Minimum |
|
|
|
|
|
|
| Accounting Policies [Line Items] |
|
|
|
|
|
|
| Weighted average remaining life of intangibles |
|
18 years
|
18 years
|
|
|
|
| Revenue contracts | Maximum |
|
|
|
|
|
|
| Accounting Policies [Line Items] |
|
|
|
|
|
|
| Weighted average remaining life of intangibles |
|
22 years
|
22 years
|
|
|
|
| Renewable Energy Facilities | Maximum |
|
|
|
|
|
|
| Accounting Policies [Line Items] |
|
|
|
|
|
|
| Useful lives of fixed assets |
|
30 years
|
30 years
|
|
|
|
| Other Income |
|
|
|
|
|
|
| Accounting Policies [Line Items] |
|
|
|
|
|
|
| Foreign currency transaction gains/losses included in other income |
|
|
$ 35,400,000
|
(4,000,000)
|
2,200,000
|
|
| China |
|
|
|
|
|
|
| Accounting Policies [Line Items] |
|
|
|
|
|
|
| Number of tariff components | tariff |
|
2
|
2
|
|
|
|
| Tariff revenue rate per kilowatt | ¥ / kWh |
|
0.552
|
0.552
|
|
|
|
| Government incentive revenue |
|
|
$ 9,300,000
|
$ 11,600,000
|
$ 12,300,000
|
|
| Solar Energy Corporation of India (SECI) | India PSA |
|
|
|
|
|
|
| Accounting Policies [Line Items] |
|
|
|
|
|
|
| Number of power plants | solar_project |
|
4
|
4
|
|
|
|
| Solar generation, conditional government subsidy | ₨ |
|
₨ 1,189.4
|
|
|
|
|
| Solar generation, subsidy receipts, next 12 months, percentage |
|
50.00%
|
50.00%
|
|
|
|
| Solar generation, subsidy receipts, year one, percentage |
|
10.00%
|
10.00%
|
|
|
|
| Solar generation, subsidy receipts, year two, percentage |
|
10.00%
|
10.00%
|
|
|
|
| Solar generation, subsidy receipts, year three, percentage |
|
10.00%
|
10.00%
|
|
|
|
| Solar generation, subsidy receipts, year four, percentage |
|
10.00%
|
10.00%
|
|
|
|
| Solar generation, subsidy receipts, year five, percentage |
|
10.00%
|
10.00%
|
|
|
|
| Other current assets | Solar Energy Corporation of India (SECI) | India PSA |
|
|
|
|
|
|
| Accounting Policies [Line Items] |
|
|
|
|
|
|
| Solar generation, government subsidies receivable |
|
|
$ 10,700,000
|
|
|
|
| Other assets | Solar Energy Corporation of India (SECI) | India PSA |
|
|
|
|
|
|
| Accounting Policies [Line Items] |
|
|
|
|
|
|
| Solar generation, government subsidies receivable |
|
|
$ 7,100,000
|
|
|
|
| Subsequent event | Solar Energy Corporation of India (SECI) | India PSA |
|
|
|
|
|
|
| Accounting Policies [Line Items] |
|
|
|
|
|
|
| Viability Gap Funding subsidies |
$ 8,900,000
|
|
|
|
|
|