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Stock-Based Compensation Plans - Additional Information (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2021 | Jun. 30, 2020 | Jun. 30, 2021 | Jun. 30, 2020
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Grants in period (in shares) |  |  | 0 | 0
Stock-based compensation expense | $ 7,720 | $ 7,932 | $ 14,423 | $ 14,882
Stock-based compensation expense, tax benefits | $ 1,200 | $ 1,400 |  |
Stock Options |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Incentive plan, total intrinsic value of stock options exercised |  |  | 7,600 | $ 10,500
LTIP Performance Shares |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Stock-based compensation expense |  |  | $ 400 |
Number of shares vested |  |  | 10,457 |
Shares withheld to pay employees' portion of minimum payroll withholding taxes |  |  | 4,527 |
Total Shareholder Return Awards (TSRs) |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Number of shares vested |  |  | 782,588 |
Vesting performance period |  |  | 3 years |
Payout rate | 200.00% |  | 200.00% |
Shares withheld to pay employees' portion of minimum payroll withholding taxes |  |  | 205,373 |
Unrecognized compensation costs | $ 26,700 |  | $ 26,700 |
Total Shareholder Return Awards (TSRs) | Minimum |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Unrecognized compensation costs, weighted average recognition period |  |  | 2 years 1 month 6 days |
Total Shareholder Return Awards (TSRs) | Maximum |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Unrecognized compensation costs, weighted average recognition period |  |  | 2 years 2 months 12 days |
Restricted Share Units (RSUs) |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Number of shares vested |  |  | 518,350 |
Shares withheld to pay employees' portion of minimum payroll withholding taxes |  |  | 153,845 |
Unrecognized compensation costs | $ 29,900 |  | $ 29,900 |
Restricted Share Units (RSUs) | Minimum |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Unrecognized compensation costs, weighted average recognition period |  |  | 2 years 1 month 6 days |
Restricted Share Units (RSUs) | Maximum |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Unrecognized compensation costs, weighted average recognition period |  |  | 2 years 2 months 12 days |
2017 Employee Stock Purchase Plan |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Shares issued under ESPP |  |  | 55,486 | 72,228
2020 Equity and Incentive Compensation Plan |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Stock-based compensation expense |  |  | $ 14,400 | $ 14,900
Stock-based compensation expense, tax benefits |  |  | $ 2,200 | $ 2,800

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