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Share-based Payments (Summary of Share Unit Activity) (Details) - $ / shares | 12 Months Ended
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Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022
PSUs (Performance Conditions) | Equity-classified |  |  |
Common shares issued |  |  |
Outstanding beginning balance (in shares) | 415,429 | 662,634 | 523,618
Granted (in shares) | 164,520 | 94,729 | 236,855
Assumed in IAA acquisition (in shares) |  | 0 |
Vested and settled (in shares) | (114,315) | (283,086) | (93,241)
Forfeited (in shares) | (15,459) | (58,848) | (4,598)
Outstanding ending balance (in shares) | 450,175 | 415,429 | 662,634
Fair Value of common shares |  |  |
Outstanding beginning balance, Weighted average grant date fair value (usd per share) | $ 58.35 | $ 51.71 | $ 45.90
Granted, Weighted average grant date fair value (usd per share) | 76.11 | 58.04 | 58.53
Assumed in IAA acquisition, Weighted average grant date fair value (per share) |  | 0 |
Vested and settled, Weighted average grant date fair value (usd per share) | 58.79 | 42.23 | 36.42
Forfeited, Weighted average grant date fair value (usd per share) | 58.37 | 60.62 | 51.76
Outstanding ending balance, Weighted average grant date fair value (usd per share) | $ 64.73 | $ 58.35 | $ 51.71
PSUs (Market Conditions) | Equity-classified |  |  |
Common shares issued |  |  |
Outstanding beginning balance (in shares) | 174,260 | 102,879 | 88,305
Granted (in shares) | 162,942 | 80,398 | 14,574
Assumed in IAA acquisition (in shares) |  | 0 |
Vested and settled (in shares) | (58,511) | 0 | 0
Forfeited (in shares) | (9,737) | (9,017) | 0
Outstanding ending balance (in shares) | 268,954 | 174,260 | 102,879
Fair Value of common shares |  |  |
Outstanding beginning balance, Weighted average grant date fair value (usd per share) | $ 74.83 | $ 66.08 | $ 65.45
Granted, Weighted average grant date fair value (usd per share) | 122.91 | 85.33 | 69.92
Assumed in IAA acquisition, Weighted average grant date fair value (per share) |  | 0 |
Vested and settled, Weighted average grant date fair value (usd per share) | 66.08 | 0 | 0
Forfeited, Weighted average grant date fair value (usd per share) | 84.04 | 68.59 | 0
Outstanding ending balance, Weighted average grant date fair value (usd per share) | $ 105.53 | $ 74.83 | $ 66.08
RSUs | Equity-classified |  |  |
Common shares issued |  |  |
Outstanding beginning balance (in shares) | 539,671 | 68,024 | 79,112
Granted (in shares) | 340,271 | 425,309 | 34,495
Assumed in IAA acquisition (in shares) |  | 366,379 |
Vested and settled (in shares) | (237,766) | (309,102) | (37,714)
Forfeited (in shares) | (34,371) | (10,939) | (7,869)
Outstanding ending balance (in shares) | 607,805 | 539,671 | 68,024
Fair Value of common shares |  |  |
Outstanding beginning balance, Weighted average grant date fair value (usd per share) | $ 53.64 | $ 58.32 | $ 54.96
Granted, Weighted average grant date fair value (usd per share) | 76.64 | 53.35 | 57.71
Assumed in IAA acquisition, Weighted average grant date fair value (per share) |  | 52.79 |
Vested and settled, Weighted average grant date fair value (usd per share) | 53.74 | 53.22 | 50.29
Forfeited, Weighted average grant date fair value (usd per share) | 62.12 | 55.06 | 60.30
Outstanding ending balance, Weighted average grant date fair value (usd per share) | $ 66.00 | $ 53.64 | $ 58.32
DSUs | Liability-classified |  |  |
Common shares issued |  |  |
Outstanding beginning balance (in shares) | 100,560 | 108,365 | 156,589
Granted (in shares) | 11,887 | 24,573 | 21,824
Assumed in IAA acquisition (in shares) |  | 0 |
Vested and settled (in shares) | (38,957) | (32,378) | (70,048)
Forfeited (in shares) | 0 | 0 | 0
Outstanding ending balance (in shares) | 73,490 | 100,560 | 108,365
Fair Value of common shares |  |  |
Outstanding beginning balance, Weighted average grant date fair value (usd per share) | $ 38.36 | $ 39.35 | $ 35.28
Granted, Weighted average grant date fair value (usd per share) | 72.93 | 55.49 | 58.24
Assumed in IAA acquisition, Weighted average grant date fair value (per share) |  | 0 |
Vested and settled, Weighted average grant date fair value (usd per share) | 45.28 | 54.68 | 36.13
Forfeited, Weighted average grant date fair value (usd per share) | 0 | 0 | 0
Outstanding ending balance, Weighted average grant date fair value (usd per share) | $ 40.29 | $ 38.36 | $ 39.35

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- Definition The number of equity-based payment instruments, excluding stock (or unit) options, that were forfeited during the reporting period. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (c)(2)(iii)(03) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480429/718-10-50-2 + Details
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- Definition Weighted average fair value as of the grant date of equity-based award plans other than stock (unit) option plans that were not exercised or put into effect as a result of the occurrence of a terminating event. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (c)(2)(iii)(03) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480429/718-10-50-2 + Details
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- Definition The weighted average fair value at grant date for nonvested equity-based awards issued during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan). + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (c)(2)(iii)(01) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480429/718-10-50-2 + Details
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