XML 35 R17.htm IDEA: XBRL DOCUMENT
v3.19.2

Other long-term liabilities | 6 Months Ended
--- | ---
Jun. 30, 2019
Other Liabilities Disclosure [Abstract] |
Other long-term liabilities | Other long-term liabilities Other long-term liabilities consist of the following:
| June 30, 2019 |  | December 31, 2018
Advances in aid of construction | $ | 60,106 |  |  | $ | 63,703 |
Environmental remediation obligation | 57,854 |  |  | 55,621 |
Asset retirement obligations | 45,535 |  |  | 43,291 |
Customer deposits | 30,329 |  |  | 29,974 |
Unamortized investment tax credits | 17,688 |  |  | 17,491 |
Deferred credits | 35,325 |  |  | 42,711 |
Preferred shares, Series C | 13,860 |  |  | 13,418 |
Lease liabilities (note 1(c)) | 10,388 |  |  | 3,436 |
Other | 33,829 |  |  | 36,274 |
| 304,914 |  |  | 305,919 |
Less: current portion | (43,787 | ) |  | (42,337 | )
| $ | 261,127 |  |  | $ | 263,582 |

X
- Definition Other Long Term Liabilities Disclosure [Text Block] + References No definition available. + Details
Name: | aqunf_OtherLongTermLiabilitiesDisclosureTextBlock
Namespace Prefix: | aqunf_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- References No definition available. + Details
Name: | us-gaap_OtherLiabilitiesDisclosureAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration