Equity (Details) $ / shares in Units, $ in Thousands |
9 Months Ended | |||||
|---|---|---|---|---|---|---|
|
Jul. 31, 2018
$ / shares
|
May 11, 2018
$ / shares
|
Mar. 09, 2018 |
Feb. 27, 2018
$ / shares
|
Sep. 30, 2018
USD ($)
Vote
$ / shares
shares
|
Dec. 31, 2017
USD ($)
|
|
| Equity [Abstract] | ||||||
| Share capital | $ | $ 10,022 | $ 10,022 | ||||
| Shares outstanding (in shares) | shares | 100,217,260 | |||||
| Nominal value per share (in dollars per share) | $ 0.10 | |||||
| Voting right per share | Vote | 1 | |||||
| Treasury shares held (in shares) | shares | 0 | |||||
| Increase (decrease) in treasury shares (in shares) | shares | 0 | |||||
| Fourth Quarter [Member] | ||||||
| Equity [Abstract] | ||||||
| Dividend declared and paid (in dollars per share) | $ 0.31 | |||||
| First Quarter [Member] | ||||||
| Equity [Abstract] | ||||||
| Dividend declared and paid (in dollars per share) | $ 0.32 | |||||
| Second Quarter [Member] | ||||||
| Equity [Abstract] | ||||||
| Dividend declared and paid (in dollars per share) | $ 0.34 | |||||
| Abengoa [Member] | ||||||
| Equity [Abstract] | ||||||
| Ownership interest | 16.50% | 16.47% | ||||
| Algonquin [Member] | ||||||
| Equity [Abstract] | ||||||
| Ownership interest | 25.00% |