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Equity-Based Compensation - Additional Information (Details) $ / shares in Units, $ in Millions |  | 12 Months Ended
--- | --- | ---
Dec. 16, 2018 installment trading_day $ / shares shares | Dec. 31, 2020 USD ($) shares | Dec. 31, 2019 USD ($) trading_day installment $ / shares shares | Dec. 31, 2018 USD ($) trading_day installment $ / shares shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Options and rights granted (shares) |  | 0 | 2,256,500 | 700,000
Unrecognized compensation cost | $ |  | $ 20.2 |  |
Equity-based compensation | $ |  | $ 13.2 | $ 10.2 | $ 9.3
Restricted Stock Awards |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Awards granted during period (shares) |  | 1,077,367 | 556,450 |
PSUs |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Awards granted during period (shares) |  | 854,367 | 389,972 |
Vesting period |  | 2 years |  |
Restricted units granted, earned during period (shares) |  | 309,692 | 245,301 |
Stock Option |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Options and rights granted (shares) |  | 0 | 2,256,500 | 700,000
Vesting percentage |  |  |  | 25.00%
Stock Option | Tranche One |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Vesting percentage |  |  | 33.30% | 50.00%
Number of annual installments | installment |  |  | 3 | 5
Stock Option | Tranche Two |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Vesting percentage |  |  | 33.30% | 25.00%
Share price (in USD per share) | $ / shares |  |  | $ 25.00 | $ 25.00
Number of consecutive trading days, threshold | trading_day |  |  | 30 | 60
Stock Option | Tranche Three |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Vesting percentage |  |  | 33.30% |
Share price (in USD per share) | $ / shares |  |  | $ 35.00 | $ 35.00
Number of consecutive trading days, threshold | trading_day |  |  | 30 | 60
SAR Awards |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Options and rights granted (shares) | 200,000 | 0 |  |
Options cancelled (shares) | 200,000 |  |  |
SAR Awards | Tranche One |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Vesting percentage | 50.00% |  |  |
Number of annual installments | installment | 5 |  |  |
SAR Awards | Tranche Two |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Vesting percentage | 25.00% |  |  |
Share price (in USD per share) | $ / shares | $ 25.00 |  |  |
Number of consecutive trading days, threshold | trading_day | 60 |  |  |
SAR Awards | Tranche Three |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Vesting percentage | 25.00% |  |  |
Share price (in USD per share) | $ / shares | $ 35.00 |  |  |
Number of consecutive trading days, threshold | trading_day | 60 |  |  |
Minimum | Restricted Stock Awards |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Vesting period |  | 3 years |  |
Minimum | PSUs |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Payable at end of period |  | 0.00% |  |
Maximum | Restricted Stock Awards |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Vesting period |  | 5 years |  |
Maximum | PSUs |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Payable at end of period |  | 150.00% |  |
2015 Omnibus Incentive Plan |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Shares authorized under plan (shares) |  | 8,315,700 |  |
Shares available for future grant (shares) |  | 5,285,421 |  |

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