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Financial instruments (Tables)
 12 Months Ended
Dec. 31, 2021
Fair Value Disclosures [Abstract]  
Schedule of Fair Value of Financial Instruments Fair value of financial instruments
December 31, 2021Carrying
amount		Fair
value		Level 1Level 2Level 3
Long-term investments carried at fair value$1,848,456 $1,848,456 $1,753,210 $— $95,246 
Development loans and other receivables32,261 33,286 — 33,286 — 
Derivative instruments:
Energy contracts designated as a cash flow hedge15,362 15,362 — — 15,362 
Interest rate swap designated as a hedge1,581 1,581 — 1,581 — 
Commodity contracts for regulated operations1,721 1,721 — 1,721 — 
Cross currency swap designated as a net investment hedge1,958 1,958 — 1,958 — 
Total derivative instruments20,622 20,622 — 5,260 15,362 
Total financial assets$1,901,339 $1,902,364 $1,753,210 $38,546 $110,608 
Long-term debt$6,211,375 $6,543,933 $2,418,580 $4,125,352 $— 
Notes payable to related party25,808 25,808 — 25,808 — 
Convertible debentures277 519 519 — — 
Preferred shares, Series C13,348 14,580 — 14,580 — 
Derivative instruments:
Energy contracts designated as a cash flow hedge60,462 60,462 — — 60,462 
Energy contracts not designated as a cash flow hedge1,169 1,169 — — 1,169 
Cross-currency swap designated as a net investment hedge50,258 50,258 — 50,258 — 
Interest rate swaps designated as a hedge7,008 7,008 — 7,008 — 
Commodity contracts for regulated operations1,348 1,348 — 1,348 — 
Total derivative instruments120,245 120,245 — 58,614 61,631 
Total financial liabilities$6,371,053 $6,705,085 $2,419,099 $4,224,354 $61,631 
24.Financial instruments (continued)
(a)Fair value of financial instruments (continued)
December 31, 2020Carrying
amount		Fair
value		Level 1Level 2Level 3
Long-term investment carried at fair value$1,839,212 $1,839,212 $1,708,683 $20,015 $110,514 
Development loans and other receivables23,804 31,088 — 31,088 — 
Derivative instruments:
Energy contracts designated as a cash flow hedge51,525 51,525 — — 51,525 
Energy contracts not designated as a cash flow hedge388 388 — — 388 
Commodity contracts for regulatory operations194 194 — 194 — 
Total derivative instruments52,107 52,107 — 194 51,913 
Total financial assets$1,915,123 $1,922,407 $1,708,683 $51,297 $162,427 
Long-term debt$4,538,470 $5,140,059 $2,316,586 $2,823,473 $— 
Notes payable to related party30,493 30,493 — 30,493 — 
Convertible debentures295 623 623 — — 
Preferred shares, Series C13,698 15,565 — 15,565 — 
Derivative instruments:
Energy contracts designated as a cash flow hedge5,597 5,597 — — 5,597 
Energy contracts not designated as a cash flow hedge332 332 — — 332 
Cross-currency swap designated as a net investment hedge84,218 84,218 — 84,218 — 
Forward Interest rate swaps designated as a hedge19,649 19,649 — 19,649 — 
Commodity contracts for regulated operations614 614 — 614 — 
Total derivative instruments110,410 110,410 — 104,481 5,929 
Total financial liabilities$4,693,366 $5,297,150 $2,317,209 $2,974,012 $5,929 
Summary of Commodity Volumes Associated with Derivative Contracts
The following are commodity volumes, in dekatherms (“dths”), associated with the above derivative contracts:
 2021
Financial contracts: Swaps
3,239,873 
         Options165,671 
3,405,544 
Schedule of Long-Term Energy Derivative Contracts
The Company reduces the price risk on the expected future sale of power generation at the Sandy Ridge, Senate and Minonk Wind Facilities by entering into the following long-term energy derivative contracts. 
Notional quantity
(MW-hrs)		ExpiryReceive average
prices (per MW-hr)		Pay floating price
(per MW-hr)
4,585,008 September 2030$24.54Illinois Hub
527,931  December 2028$32.11PJM Western HUB
2,465,763  December 2027$23.67NI HUB
1,998,095  December 2027$36.46ERCORT North HUB
Schedule of Derivative Financial Instruments Designated as Cash Flow Hedge, Effect on Consolidated Statement of Operations
The following table summarizes OCI attributable to derivative financial instruments designated as a cash flow hedge: 
20212020
Effective portion of cash flow hedge$(97,103)$(13,418)
Amortization of cash flow hedge(2,132)(1,248)
Amounts reclassified from AOCI44,904 (9,616)
OCI attributable to shareholders of AQN$(54,331)$(24,282)
Schedule of Effects on Statement of Operations of Derivative Financial Instruments Not Designated as Hedges
The effects on the consolidated statements of operations of derivative financial instruments not designated as hedges consist of the following:
20212020
Change in unrealized loss on derivative financial instruments:
Energy derivative contracts$(5,353)$(901)
Total change in unrealized loss on derivative financial instruments$(5,353)$(901)
Realized gain (loss) on derivative financial instruments:
Energy derivative contracts$(108)$(1,145)
Currency forward contract2,329 2,363 
Total realized loss on derivative financial instruments$2,221 $1,218 
Loss on derivative financial instruments not accounted for as hedges(3,132)317 
Amortization of AOCI gains frozen as a result of hedge dedesignation3,712 3,009 
$580 $3,326 
Amounts recognized in the consolidated statements of operations consist of:
Gain (loss) on derivative financial instruments $(1,749)$964 
Gain on foreign exchange2,329 2,362 
$580 $3,326 
Schedule of Maximum Credit Risk Exposure for Financial Instruments
As of December 31, 2021, the Company’s maximum exposure to credit risk for these financial instruments was as follows: 
 2021
Cash and cash equivalents and restricted cash$161,389 
Accounts receivable422,752 
Allowance for doubtful accounts(19,327)
Notes receivable31,468 
$596,282 
Schedule of Liabilities Maturity Profile
The Company’s liabilities mature as follows: 
Due less
than 1 year		Due 2 to 3
years		Due 4 to 5
years		Due after
5 years		Total
Long-term debt obligations$834,645 $500,070 $1,217,235 $3,671,384 $6,223,334 
Interest on long-term debt196,824 348,479 297,461 1,004,448 1,847,212 
Purchase obligations614,024 — — — 614,024 
Environmental obligation12,751 23,876 1,066 19,474 57,167 
Advances in aid of construction1,706 — — 80,874 82,580 
Derivative financial instruments:
Cross-currency swap27,936 23,115 2,604 1,888 55,543 
Interest rate swaps2,145 2,141 1,335 1,394 7,015 
Energy derivative and commodity contracts8,489 20,148 16,517 17,826 62,980 
Contract adjustment payments on Green Equity Units75,555 112,025 — — 187,580 
Other obligations66,916 4,473 4,427 260,111 335,927 
Total obligations$1,840,991 $1,034,327 $1,540,645 $5,057,399 $9,473,362