Our Portfolio - Equity Method Investments, Additional Information (Details) - USD ($) |
1 Months Ended | 3 Months Ended | 12 Months Ended | 36 Months Ended | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Dec. 31, 2018 |
Dec. 31, 2018 |
Sep. 30, 2018 |
Jun. 30, 2018 |
Mar. 31, 2018 |
Dec. 31, 2017 |
Sep. 30, 2017 |
Jun. 30, 2017 |
Mar. 31, 2017 |
Dec. 31, 2018 |
Dec. 31, 2017 |
Dec. 31, 2016 |
Dec. 31, 2018 |
|
| Schedule of Equity Method Investments [Line Items] | |||||||||||||
| Loss from equity method investments | $ (2,192,000) | $ (11,671,000) | $ (10,583,000) | $ 2,285,000 | $ (2,866,000) | $ (6,876,000) | $ (8,377,000) | $ (4,171,000) | $ (22,162,000) | $ (22,289,000) | $ (6,110,000) | ||
| Sale of equity interest | 35,849,000 | 6,044,000 | 0 | ||||||||||
| Equity method investments | $ 471,044,000 | 471,044,000 | 522,615,000 | 471,044,000 | 522,615,000 | $ 471,044,000 | |||||||
| OTTI on equity method investments | 0 | 0 | 0 | ||||||||||
| Portfolio of Behind-the-meter Solar Projects [Member] | |||||||||||||
| Schedule of Equity Method Investments [Line Items] | |||||||||||||
| Loss from equity method investments | 5,000,000 | ||||||||||||
| Sale of equity interest | 24,000,000 | ||||||||||||
| Equity method investments | 29,000,000 | 29,000,000 | 29,000,000 | 29,000,000 | |||||||||
| Equity interest acquired in joint venture | $ 27,000,000 | ||||||||||||
| Cash received from the investment | 10,000,000 | ||||||||||||
| Investment in Solar Projects in U.S. Virgin Islands [Member] | |||||||||||||
| Schedule of Equity Method Investments [Line Items] | |||||||||||||
| Equity method investments | $ 10,000,000 | $ 10,000,000 | $ 10,000,000 | $ 10,000,000 | |||||||||
| Investment Contracts [Member] | Wind Projects [Member] | |||||||||||||
| Schedule of Equity Method Investments [Line Items] | |||||||||||||
| Loss from equity method investments | $ 8,000,000 | ||||||||||||
| Equity method investments | $ 25,000,000 | $ 25,000,000 | |||||||||||
| X | ||||||||||
- Definition Amount of distribution received from equity method investee for return on investment, classified as operating activities. Excludes distribution for return of investment, classified as investing activities. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition This item represents an other than temporary decline in value that has been recognized against an investment accounted for under the equity method of accounting. The excess of the carrying amount over the fair value of the investment represents the amount of the write down which is or was reflected in earnings. The written down value is a new cost basis with the adjusted value of the investment becoming its new carrying value subject to the equity accounting method. Evidence of a loss in value might include, but would not necessarily be limited to, absence of an ability to recover the carrying amount of the investment or inability of the investee to sustain an earnings capacity which would justify the carrying amount of the investment. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition This item represents the carrying amount on the entity's balance sheet of its investment in common stock of an equity method investee. This is not an indicator of the fair value of the investment, rather it is the initial cost adjusted for the entity's share of earnings and losses of the investee, adjusted for any distributions (dividends) and other than temporary impairment (OTTI) losses recognized. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition This item represents the entity's proportionate share for the period of the net income (loss) of its investee (such as unconsolidated subsidiaries and joint ventures) to which the equity method of accounting is applied. This item includes income or expense related to stock-based compensation based on the investor's grant of stock to employees of an equity method investee. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition The cash outflow associated with the investment in or advances to an entity in which the reporting entity shares control of the entity with another party or group. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition The cash inflow associated with the sale of equity method investments, which are investments in joint ventures and entities in which the entity has an equity ownership interest normally of 20 to 50 percent and exercises significant influence. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. No definition available.
|
| X | ||||||||||
- Details
|
| X | ||||||||||
- Details
|
| X | ||||||||||
- Details
|
| X | ||||||||||
- Details
|