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Redeemable Preferred Stock - Additional Information (Details) $ / shares in Units, $ in Thousands |  |  | 3 Months Ended |  |  |
--- | --- | --- | --- | --- | --- | ---
Dec. 18, 2020 USD ($) | Mar. 31, 2005 shares | Jan. 31, 2021 USD ($) $ / shares shares | Jan. 31, 2021 CAD ($) | Jan. 31, 2020 USD ($) | Jan. 31, 2020 CAD ($) | Dec. 31, 2020 CAD ($) | Dec. 18, 2020 CAD ($) | Oct. 31, 2020 USD ($) shares | Oct. 31, 2020 CAD ($) shares
Class Of Stock [Line Items] |  |  |  |  |  |  |  |  |  |
Preferred stock, shares authorized | shares |  |  | 250,000 |  |  |  |  |  |  |
Preferred stock, par value | $ / shares |  |  | $ 0.01 |  |  |  |  |  |  |
Derivative liability, fair value, gross liability |  |  |  |  | $ 600 |  |  |  |  |
Series B Preferred Stock [Member] |  |  |  |  |  |  |  |  |  |
Class Of Stock [Line Items] |  |  |  |  |  |  |  |  |  |
Preferred stock, shares authorized | shares |  | 105,875 | 105,875 |  |  |  |  |  |  |
Preferred stock, dividend rate, percentage |  | 5.00% |  |  |  |  |  |  |  |
Preferred stock, liquidation preference per share | $ / shares |  |  | $ 1,000.00 |  |  |  |  |  |  |
Preferred stock, shares issued | shares |  |  | 64,020 |  |  |  |  |  | 64,020 | 64,020
Preferred stock shares outstanding | shares |  |  | 64,020 |  |  |  |  |  | 64,020 | 64,020
Temporary equity, carrying amount, attributable to parent |  |  | $ 59,857 |  |  |  |  |  | $ 59,857 |
Dividends, preferred stock, cash |  |  | $ 800 |  | 2,400 |  |  |  |  |
Class A Preferred Shares [Member] |  |  |  |  |  |  |  |  |  |
Class Of Stock [Line Items] |  |  |  |  |  |  |  |  |  |
Preferred stock shares outstanding | shares |  |  |  |  |  |  |  |  | 1,000,000 | 1,000,000
Return of capital and dividend payments |  |  |  |  |  | $ 1,200,000 |  |  |  |
Interest expense, other |  |  |  | $ 600,000 |  | 600,000 |  |  |  |
Carrying value of preferred shares, total |  |  |  |  |  |  |  |  | $ 19,200 | $ 25,600,000
Increase in dividend rate annually |  |  | 15.00% | 15.00% |  |  |  |  |  |
Aggregate amount of dividend payment |  |  |  | $ 500,000 |  |  |  |  |  |
Return of capital payments |  |  |  | $ 750,000 |  |  |  |  |  |
Loss resulted from revised fair value of preferred shares |  |  |  |  | $ 200 | $ 200,000 |  |  |  |
Class A Preferred Shares [Member] | Minimum [Member] |  |  |  |  |  |  |  |  |  |
Class Of Stock [Line Items] |  |  |  |  |  |  |  |  |  |
Preferred stock, redemption date |  |  | Dec. 31, 2020 | Dec. 31, 2020 |  |  |  |  |  |
Class A Preferred Shares [Member] | Maximum [Member] |  |  |  |  |  |  |  |  |  |
Class Of Stock [Line Items] |  |  |  |  |  |  |  |  |  |
Preferred stock, redemption date |  |  | Dec. 31, 2021 | Dec. 31, 2021 |  |  |  |  |  |
Series 1 Preferred Shares [Member] | Enbridge Incorporation [Member] |  |  |  |  |  |  |  |  |  |
Class Of Stock [Line Items] |  |  |  |  |  |  |  |  |  |
Carrying value of preferred shares, total |  |  |  |  |  |  | $ 27,400,000 |  |  |
Accrued dividend |  |  |  |  |  |  | 23,100,000 |  |  |
Preferred stock redemption amount |  |  |  |  |  |  | $ 4,300,000 |  |  |
Payment of amount owed | $ 21,500 |  |  |  |  |  |  | $ 27,400,000 |  |
Gains losses on extinguishment of debt | $ 900 |  |  |  |  |  |  |  |  |

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