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Non-cash operating items | 12 Months Ended
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Dec. 31, 2018
Disclosure Changes In Non Cash Operating Items [Abstract] |
Non-cash operating items | Non-cash operating items The changes in non-cash operating items consist of the following:
| 2018 |  | 2017
Accounts receivable | $ | 3,005 |  |  | $ | (45,818 | )
Fuel and natural gas in storage | 1,351 |  |  | (4,385 | )
Supplies and consumables inventory | (7,189 | ) |  | (1,864 | )
Income taxes recoverable | (763 | ) |  | (557 | )
Prepaid expenses | 2,907 |  |  | (2,755 | )
Accounts payable | (22,915 | ) |  | 7,525 |
Accrued liabilities | 28,687 |  |  | 14,041 |
Current income tax liability | 2,974 |  |  | (3,190 | )
Asset retirements and environmental obligations | (7,293 | ) |  | (4,372 | )
Net regulatory assets and liabilities | (8,890 | ) |  | (46,344 | )
| $ | (8,126 | ) |  | $ | (87,719 | )

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- Definition Disclosure of Other Significant Noncash Transactions. + References No definition available. + Details
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