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Stock-based compensation - Narrative (Details) - USD ($) |  |  |  | 3 Months Ended | 6 Months Ended
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Mar. 18, 2025 | Mar. 08, 2024 | Jan. 03, 2023 | Jun. 30, 2025 | Mar. 31, 2025 | Dec. 31, 2024 | Jun. 30, 2024 | Jun. 30, 2025 | Jun. 30, 2024
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items] |  |  |  |  |  |  |  |  |
Aggregate intrinsic value of exercisable service vesting-based stock options |  |  |  | $ 2,200,000 |  |  |  | $ 2,200,000 |
Intrinsic value of service vesting-based awards exercised |  |  |  | $ 200,000 |  |  |  | $ 200,000 |
Service based-vesting options granted (in shares) |  |  |  | 0 |  |  |  | 0 |
Weighted average remaining contractual life (year) |  |  |  |  |  |  |  | 10 months 24 days |
Stock based compensation expense |  |  |  | $ 5,849,000 |  |  | $ 3,971,000 | $ 10,002,000 | $ 8,099,000
Vesting period (year) |  |  |  |  |  |  |  | 4 years |
Options |  |  |  |  |  |  |  |  |
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items] |  |  |  |  |  |  |  |  |
Unrecognized compensation costs for service vesting-based stock options |  |  |  | 0 |  |  |  | $ 0 |
Restricted Stock |  |  |  |  |  |  |  |  |
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items] |  |  |  |  |  |  |  |  |
Unrecognized compensation costs for service vesting-based stock options |  |  |  | 23,600,000 |  |  |  | 23,600,000 |
Aggregate fair value of the service vesting-based awards granted |  |  |  | 3,900,000 |  |  |  | 11,300,000 |
Aggregate fair value of the service vesting-based awards that vested |  |  |  | 1,700,000 |  |  |  | 6,100,000 |
Stock based compensation expense |  |  |  | $ 2,800,000 |  |  |  | $ 5,500,000 |
Period for recognition (year) |  |  |  |  |  |  |  | 2 years 9 months 18 days |
Granted (in shares) |  |  |  |  |  |  |  | 466,150 |
Grant date fair value (in dollars per share) |  |  |  | $ 18.06 |  | $ 16.00 |  | $ 18.06 |
Performance Shares |  |  |  |  |  |  |  |  |
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items] |  |  |  |  |  |  |  |  |
Unrecognized compensation costs for service vesting-based stock options |  |  |  | $ 1,800,000 |  |  |  | $ 1,800,000 |
Service based-vesting options granted (in shares) |  |  |  | 0 |  |  |  | 0 |
Stock based compensation expense |  |  |  | $ 900,000 |  | $ 400,000 |  | $ 1,300,000 |
Period for recognition (year) |  |  |  |  |  |  |  | 6 months |
Granted (in shares) |  | 109,512 |  |  |  |  |  |  |
Grant date fair value (in dollars per share) |  | $ 17.36 |  |  |  |  |  |  |
Shares granted percentage |  |  |  |  | 200.00% | 100.00% |  |  |
Incremental cost |  |  |  |  | $ 1,600,000 |  |  |  |
Performance Shares | Minimum |  |  |  |  |  |  |  |  |
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items] |  |  |  |  |  |  |  |  |
Total shareholder return attainment (percent) |  | 0.00% |  |  |  |  |  |  |
Performance Shares | Maximum |  |  |  |  |  |  |  |  |
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items] |  |  |  |  |  |  |  |  |
Total shareholder return attainment (percent) |  | 200.00% |  |  |  |  |  |  |
Market-based Restricted Stock |  |  |  |  |  |  |  |  |
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items] |  |  |  |  |  |  |  |  |
Unrecognized compensation costs for service vesting-based stock options |  |  |  | 9,900,000 |  |  |  | $ 9,900,000 |
Stock based compensation expense |  | $ 300,000 | $ 1,600,000 | $ 2,200,000 |  |  | 1,200,000 | $ 3,200,000 | 2,500,000
Period for recognition (year) |  |  |  |  |  |  |  | 1 year 3 months 18 days |
Granted (in shares) |  |  |  |  |  |  |  | 451,801 |
Grant date fair value (in dollars per share) |  |  |  | $ 33.02 |  | $ 25.69 |  | $ 33.02 |
Measurement date with a maturity period (year) |  |  |  |  |  |  |  | 2 years |
Dividend yield (percent) | 0.00% | 0.00% | 0.00% |  |  |  |  | 0.00% |
Aggregate fair value of the market-based awards granted |  |  |  | $ 0 |  |  | 0 | $ 6,300,000 | 6,300,000
Aggregate fair value of the market-based awards that vested |  |  |  | $ 0 |  |  | $ 0 | $ 11,500,000 | $ 5,100,000
Market-based Restricted Stock | Minimum |  |  |  |  |  |  |  |  |
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items] |  |  |  |  |  |  |  |  |
Total shareholder return attainment (percent) | 0.00% | 0.00% | 0.00% |  |  |  |  |  |
Market-based Restricted Stock | Maximum |  |  |  |  |  |  |  |  |
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items] |  |  |  |  |  |  |  |  |
Total shareholder return attainment (percent) | 200.00% | 200.00% | 200.00% |  |  |  |  |  |

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