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Non-cash operating items
 12 Months Ended
Dec. 31, 2021
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:
20212020
Accounts receivable$(56,751)$(52,778)
Fuel and natural gas in storage(43,642)237 
Supplies and consumables inventory445 1,058 
Income taxes recoverable(3,025)(3,440)
Prepaid expenses(1,189)(15,411)
Accounts payable(33,399)40,885 
Accrued liabilities31,845 (29,150)
Current income tax liability4,363 3,818 
Asset retirements and environmental obligations(1,185)3,562 
Net regulatory assets and liabilities(419,484)(26,260)
$(522,022)$(77,479)