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Share-based Payments (Narrative) (Details) |  |  | 1 Months Ended | 12 Months Ended |  |
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Jun. 15, 2023 | Mar. 20, 2023 USD ($) shares | Aug. 31, 2023 shares | Jun. 30, 2022 | Dec. 31, 2023 USD ($) purchasePeriod offering $ / shares shares | Dec. 31, 2022 USD ($) $ / shares shares | Dec. 31, 2021 USD ($) $ / shares shares | May 09, 2023 shares | May 08, 2023 shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |
Share-based payment expense |  |  |  |  | $ 57,500,000 | $ 44,500,000 | $ 33,900,000 |  |
Maximum contribution |  |  |  |  | $ 25,000 |  |  |  |
Stock options |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |
Remaining shares authorized for grant (in shares) | shares |  |  |  |  | 8,511,523 | 3,919,069 |  |  |
Number of options assumed in acquisition (in shares) | shares |  |  |  |  | 187,727 |  |  |  |
Award vesting period |  |  |  |  | 3 years |  |  |  |
Award term |  |  |  |  | 10 years |  |  |  |
Weighted average grant date fair value of options granted (usd per share) | $ / shares |  |  |  |  | $ 17.63 | $ 14.35 | $ 12.72 |  |
Unrecognized compensation costs |  |  |  |  | $ 4,200,000 |  |  |  |
Unrecognized compensation costs, period for recognition |  |  |  |  | 1 year 3 months 18 days |  |  |  |
Proceeds from exercise of employee stock options |  |  |  |  | $ 34,500,000 | $ 5,900,000 | $ 16,300,000 |  |
Actual tax benefit realized from option exercise |  |  |  |  | $ 800,000 | $ 400,000 | $ 1,800,000 |  |
Stock options granted (in shares) | shares |  |  |  |  | 262,725 | 710,847 | 758,256 |  |
Premium-priced stock options |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |
Number of options assumed in acquisition (in shares) | shares |  |  |  |  | 0 |  |  |  |
Unrecognized compensation costs |  |  |  |  | $ 1,200,000 |  |  |  |
Unrecognized compensation costs, period for recognition |  |  |  |  | 9 months 18 days |  |  |  |
Stock options granted (in shares) | shares |  |  |  |  | 0 | 119,157 | 1,017,064 |  |
Weighted average estimated grant date fair value (usd per share) | $ / shares |  |  |  |  |  | $ 8.00 |  |  |
Performance Shares | Equity-classified awards |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |
Number of RSUs assumed in acquisition (in shares) | shares |  |  | 159,475 |  | 0 |  |  |  |
Senior Executive PSU Plan |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |
Performance period |  |  | 3 years |  |  |  |  |  |
Performance Share Units With Market Conditions |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |
Weighted average grant date fair value of options granted (usd per share) | $ / shares |  |  |  |  | $ 85.33 | $ 69.92 |  |  |
Unrecognized compensation costs |  |  |  |  | $ 5,300,000 |  |  |  |
Unrecognized compensation costs, period for recognition |  |  |  |  | 2 years 1 month 6 days |  |  |  |
Performance period |  |  |  | 2 years | 3 years |  |  |  |
Award holding period |  |  |  |  |  | 1 year |  |  |
Discount value | $ / shares |  |  |  |  |  | $ 5.34 |  |  |
Effective tax rate |  |  |  |  |  | 35.00% |  |  |
Performance Share Units With Market Conditions | Equity-classified awards |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |
Number of RSUs assumed in acquisition (in shares) | shares |  |  |  |  | 0 |  |  |  |
Restricted Stock Units (RSUs) |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |
Unrecognized compensation costs |  |  |  |  | $ 14,300,000 |  |  |  |
Unrecognized compensation costs, period for recognition |  |  |  |  | 1 year 4 months 24 days |  |  |  |
Restricted Stock Units (RSUs) | Equity-classified awards |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |
Number of RSUs assumed in acquisition (in shares) | shares |  |  |  |  | 366,379 |  |  |  |
Deferred Share Units |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |
Unrecognized compensation costs |  |  |  |  | $ 0 |  |  |  |
Share unit liability |  |  |  |  | 7,600,000 | $ 6,300,000 |  |  |
Employee Share Purchase Plan |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |
Share-based payment expense |  |  |  |  | $ 4,700,000 |  |  |  |
Weighted average grant date fair value of options granted (usd per share) | $ / shares |  |  |  |  | $ 12.43 |  |  |  |
Purchase of shares in company | 85.00% |  |  |  |  |  |  |  |
Number of ESPP offerings | offering |  |  |  |  | 2 |  |  |  |
Number of ESPP purchase periods | purchasePeriod |  |  |  |  | 2 |  |  |  |
Fair value, grant date (usd per share) | $ / shares |  |  |  |  | $ 11.99 |  |  |  |
Payroll withholding liability |  |  |  |  | $ 1,800,000 |  |  |  |
IAA |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |
Number of options assumed in acquisition (in shares) | shares |  | 187,727 |  |  |  |  |  |  |
Number of RSUs assumed in acquisition (in shares) | shares |  | 366,379 |  |  |  |  |  |  |
Estimated aggregate fair value of converted share-based awards |  | $ 24,900,000 |  |  |  |  |  |  |
Share-based payment expense |  | 4,800,000 |  |  |  |  |  |  |
IAA | Non-employee directors |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |
Share-based payment expense |  | 300,000 |  |  |  |  |  |  |
IAA | Former executives |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |
Share-based payment expense |  | $ 4,300,000 |  |  |  |  |  |  |
IAA | Stock options |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |
Weighted average share price of options assumed (usd per share) | $ / shares |  |  |  |  | $ 15.52 |  |  |  |
2023 Share Incentive Plan |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |
Remaining shares authorized for grant (in shares) | shares |  |  |  |  |  |  |  |  | 9,355,000
PSU |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |
Market value of shares vested and released |  |  |  |  | $ 1,800,000 | $ 4,900,000 | $ 0 |  |
Senior Executive PSU Plan | Performance Shares |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |
Unrecognized compensation costs |  |  |  |  | $ 7,600,000 |  |  |  |
Unrecognized compensation costs, period for recognition |  |  |  |  | 1 year 9 months 18 days |  |  |  |
2023 ESPP |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |
Remaining shares authorized for grant (in shares) | shares |  |  |  |  | 2,819,497 |  |  | 3,000,000 |
Share issued under ESPP (in shares) | shares |  |  |  |  | 180,503 |  |  |  |
2023 ESPP | Employee Share Purchase Plan |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |
Market price discount | 15.00% |  |  |  |  |  |  |  |

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