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Stock-Based Compensation - Narrative (Details) - USD ($) |  | 3 Months Ended | 12 Months Ended
--- | --- | --- | ---
Feb. 19, 2019 | Mar. 31, 2020 | Mar. 31, 2019 | Dec. 31, 2019
Stock-based Compensation arrangements |  |  |  |
Stock based compensation expense |  | $ 16,300,000 | $ 15,100,000 |
Decrease to tax expense from stock-based compensation activities |  |  | $ 1,100,000 |
Increase to tax expense from stock-based compensation activities |  | $ 1,300,000 |  |
Restricted Stock Units |  |  |  |
Stock-based Compensation arrangements |  |  |  |
Granted (in shares) |  | 121,197 |  |
Granted (in dollars per share) |  | $ 15.65 |  |
Performance Share Awards | Minimum |  |  |  |
Stock-based Compensation arrangements |  |  |  |
Annual forfeiture rate assumption (as a percent) |  | 0.00% |  |
Performance Share Awards | Maximum |  |  |  |
Stock-based Compensation arrangements |  |  |  |
Annual forfeiture rate assumption (as a percent) |  | 5.00% |  |
Performance Share Awards Based on Internal Performance Metrics |  |  |  |
Stock-based Compensation arrangements |  |  |  |
Right to receive additional shares, maximum |  | 100.00% |  |
Employee Performance Share Awards |  |  |  |
Stock-based Compensation arrangements |  |  |  |
Granted (in shares) |  | 722,500 |  |
Granted (in dollars per share) |  | $ 15.60 |  |
Minimum operating cash flow for the year preceding the performance period |  |  |  | $ 100,000,000
Number of years over which performance criteria is to be met |  | 3 years |  |
Employee Performance Share Awards | Hybrid performance share awards, percentage vesting on the third anniversary |  |  |  |
Stock-based Compensation arrangements |  |  |  |
Award vesting rights (as a percent) |  | 100.00% |  |
Hybrid Performance Share Awards |  |  |  |
Stock-based Compensation arrangements |  |  |  |
Granted (in shares) |  | 506,412 |  |
Granted (in dollars per share) |  | $ 15.60 |  |
Minimum operating cash flow for the year preceding the performance period |  | $ 100,000,000 |  |
Hybrid Performance Share Awards | Hybrid performance share awards, percentage vesting on the first anniversary |  |  |  |
Stock-based Compensation arrangements |  |  |  |
Award vesting rights (as a percent) |  | 25.00% |  |
Hybrid Performance Share Awards | Hybrid performance share awards, percentage vesting on the second anniversary |  |  |  |
Stock-based Compensation arrangements |  |  |  |
Award vesting rights (as a percent) |  | 25.00% |  |
Hybrid Performance Share Awards | Hybrid performance share awards, percentage vesting on the third anniversary |  |  |  |
Stock-based Compensation arrangements |  |  |  |
Award vesting rights (as a percent) |  | 50.00% |  |
Performance Shares Based on Market Conditions |  |  |  |
Stock-based Compensation arrangements |  |  |  |
Right to receive shares |  | 100.00% |  |
Right to receive an additional award in cash |  | 100.00% |  |
TSR Performance Share Awards |  |  |  |
Stock-based Compensation arrangements |  |  |  |
Granted (in shares) |  | 862,180 |  |
Granted (in dollars per share) | $ 13.79 |  |  |
Performance period |  | 3 years |  |
TSR Performance Share Awards | Minimum |  |  |  |
Stock-based Compensation arrangements |  |  |  |
Granted (in dollars per share) |  | $ 15.60 |  |
TSR Performance Share Awards | Maximum |  |  |  |
Stock-based Compensation arrangements |  |  |  |
Granted (in dollars per share) |  | $ 17.16 |  |

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