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Capital Management (Tables) | 12 Months Ended
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Dec. 31, 2018
Capital Management [Abstract] |
Summary of Capitalisation and Ratio | As at December 31, 2018 and 2017, these ratios were as follows:
|  | 2018 |  |  | 2017 |
Long-term debt |  | $ | 1,706,253 |  |  | $ | 1,730,437 |
Shareholders’ equity |  |  | 1,557,752 |  |  |  | 1,810,336 |
Total capitalization |  | $ | 3,264,005 |  |  | $ | 3,540,773 |
Long-term debt to long-term debt plus equity ratio |  |  | 0.52 |  |  |  | 0.49 |

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